You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you today?

USER: I would like to cancel my reservation as my appointment with my doctor got cancelled. Can you help me with it?

ASSISTANT: Sure, may I know your good name please?

USER: David Adams is my name.

ASSISTANT: Ok,please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation found with your name.

USER: It's ok, thank you for the information.

ASSISTANT: Thanks for opting us.