Hi.
Hello, how may I aid you?
Owing to an emergency, my scheduled trip with my friends  to Washington has been postponed. So I want you to change my existing reservation?
Sure, may I know your good name please?
Sure, I had a earlier reservation with name Rachel Allen.
Ok, please wait a moment.
Sure.
Thank you for being wait. Unfortunately there is no reservation found with your name.
Ok, no worries at all. Thanks for your assistance.
Thank you for approaching us.