You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Sharon Green. I want to cancel my recent reservation due to sudden postpone of my client meeting.

ASSISTANT: Ok.

USER: Can you help me with that?

ASSISTANT: Sure, please wait a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is  no reservation found on your name.

USER: That's ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you for helping me.