Hi BhanuPRakash,
You should to tell us with Rest adapter are you using: the SAP new one, advantco and so on.
You can try to use the MultiPartHeaderBean to set that parameter and later with the dynamicConfiguration to get it. Check Michal's blog PI/XI: Quick tip: Preserving attributes of XI messages via MultipartHeaderBean
I haven't tried it, but you can try in a first shoot if the Session ID is set to the dynamic configuration.
I don't think you can set you Rest sender adapter like the SOAP adapter with Do not Use SOAP envelope, this would be another alternative.
Regards.