You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: I would like to change my reservation due to postponed of my meeting. Will you help me to change my reservation?

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is Carolyn Thomas.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: No problem, thanks for your service.

ASSISTANT: Thank you for reaching us.