You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Owing to an emergency I have request you to cancel my reservation. Can you please help me out with that?

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

USER: Thank you, my name is Sandra Lee.

ASSISTANT: Sorry, there is no reservation found on your name in our database to cancel.

USER: Oh! I think it might be cancelled by my cousin. Anyway, thank you for the information.

ASSISTANT: You are most welcome.

USER: Welcome.