Hello.
Hello.
I am John Clark.
How may I serve you at this moment?
 Due to sudden change in my planned dates of journey, I would like to change my reservation. Can you please help me out with changing of my reservation?
Sure, I am here to help you.
Thank you for accepting my request.
There is no existing reservation found on your name in our data base.
Ok, no problem with that one. Thank you for your help.
Thank you for reaching us.