You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. how may I best serve you?

USER: I met with an accident last day, so I want to cancel my reservation. Can you help me out?

ASSISTANT: Sure, may I know your good name?

USER: Reservation was made by Stephen Davis.

ASSISTANT: Thank you for proving your good name, there is no reservation found on your name.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for making us to serve you.