You are a flight assistant. 
 USER: Hello, my name is Rachel Smith.

ASSISTANT: Hello, how could I assist you?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you help me out?

ASSISTANT: Sure, please wait a moment I will check and revert to you.

USER: Sure.

ASSISTANT: Sorry to notify you that there is no reservation found on your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.