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