You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: My business meeting has been postponed, so I would like to cancel my reservation. Can you help me please?

ASSISTANT: Sure, may I know your name for finding your reservation?

USER: Sure, my name is Kathleen Garcia.

ASSISTANT: No reservation found on your name Mr.Kathleen Garcia.

USER: That's fine. Thank you for your service.

ASSISTANT: Thank you for choosing us.