Best Index

Following is the architecture of the table:

CREATE TABLE [dbo].[SMS_Campaign_Attempts](
	[ID] [int] IDENTITY(1,1) NOT NULL,
	[CampaignID] [int] NULL,
	[OfferProduct] [varchar](50) NOT NULL,
	[MobileNumber] [numeric](18, 0) NOT NULL,
	[SMSMessage] [varchar](255) NOT NULL,
	[SendDate] [date] NOT NULL,
	[CustomerID] [varchar](max) NULL,
 CONSTRAINT [PK_SMS_Campaign_Attempts] PRIMARY KEY CLUSTERED 
(
	[ID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]

Now below are three update scripts which I need to run:

1.

UPDATE Atmpt
SET SMSMessage=REPLACE(SMSMessage,'Customer',ISNULL(CASE WHEN LEN(ISNULL(FNAME,''))=10 THEN FNAME
							 WHEN LEN(ISNULL(FNAME,''))>=4 AND LEN(ISNULL(FNAME,''))<10 AND (LEN(FNAME)+LEN(MNAME)>=10 OR LEN(FNAME)+LEN(MNAME) IS NULL)THEN FNAME
							 WHEN LEN(ISNULL(FNAME,''))>=4 AND LEN(ISNULL(FNAME,''))<10 AND LEN(ISNULL(FNAME,''))+LEN(ISNULL(MNAME,''))<10  THEN FNAME+' '+MNAME
							 WHEN LEN(ISNULL(FNAME,''))<4  AND LEN(ISNULL(LNAME,''))>=3 AND LEN(ISNULL(FNAME,''))+LEN(ISNULL(LNAME,''))<10  THEN FNAME+' '+LNAME
							 WHEN LEN(ISNULL(FNAME,''))<4  AND LEN(ISNULL(MNAME,''))>=3 AND LEN(FNAME)+LEN(ISNULL(LNAME,''))<10  THEN FNAME+' '+MNAME
							 WHEN LEN(ISNULL(FNAME,''))<3  AND LEN(ISNULL(MNAME,''))<3  AND LEN(ISNULL(LNAME,''))<=10 THEN LNAME
							 WHEN LEN(ISNULL(FNAME,'')+ISNULL(MNAME,''))=10  AND LEN(ISNULL(LNAME,''))>10 THEN FNAME+MNAME
							 WHEN LEN(ISNULL(FNAME,'')+ISNULL(MNAME,''))<10  THEN FNAME+' '+MNAME
							 WHEN LEN(ISNULL(FNAME,'')+ISNULL(LNAME,''))<10  THEN FNAME+' '+LNAME
							 ELSE 'Customer'
						END,''))
FROM	SMS_Campaign_Attempts Atmpt WITH(NOLOCK)
		JOIN DM_CRM..Channel_SMS SMS WITH(NOLOCK)ON SMS.MobileNumber=Atmpt.MobileNumber
		JOIN DM_MKTANL.DM_BAFL.DBO.DimCustomer DimCust WITH(NOLOCK)ON DimCust.CustomerID=SMS.CustomerID
WHERE OfferProduct IN ('SEPHL','SHL','SBS_LAP','SBS_PSBL','SBS_HL','SALPL','SALPL_LIVR')
	  AND SendDate=CONVERT(DATE,GETDATE())

2.

UPDATE SMS_Campaign_Attempts
SET SMSMessage=REPLACE(SMSMessage,'Dear ,','Dear Customer,')
WHERE OfferProduct IN ('SEPHL','SHL','SBS_LAP','SBS_PSBL','SBS_HL')
	AND SendDate=CONVERT(DATE,GETDATE())
	AND SMSMessage LIKE 'Dear ,%'

3.

UPDATE Atmpt
SET SMSMessage=REPLACE(SMSMessage,'OfferAmount',CONVERT(INT,IC.OfferAmount))
FROM SMS_Campaign_Attempts Atmpt JOIN #InterimCampaign IC ON IC.OfferProduct=Atmpt.OfferProduct AND Atmpt.MobileNumber=IC.MobileNumber
WHERE Atmpt.OfferProduct IN ('SBS_LAP','SBS_PSBL','SBS_HL')
	  AND SendDate=CONVERT(DATE,GETDATE())

Now When I create estimated execution plan. I get three Missing Indexes as following respectively:

CREATE NONCLUSTERED INDEX [<Name of Missing Index, sysname,>]
ON [dbo].[SMS_Campaign_Attempts] ([SendDate],[OfferProduct])
INCLUDE ([ID],[MobileNumber],[SMSMessage])

CREATE NONCLUSTERED INDEX [<Name of Missing Index, sysname,>]
ON [dbo].[SMS_Campaign_Attempts] ([SendDate],[OfferProduct],[SMSMessage])
INCLUDE ([ID])

CREATE NONCLUSTERED INDEX [<Name of Missing Index, sysname,>]
ON [dbo].[#InterimCampaign] ([OfferProduct])
INCLUDE ([MobileNumber],[OfferAmount])
GO

So my question is that I know I can't avoid the third index but is there any way where I can club first two indexes into one.

If any more details are needed please let me know.

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