You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Timothy Phillips here. Due to sudden health issue, I would like to cancel my reservation. Can you please help me out with that?

ASSISTANT: Please wait a while.

USER: Ok, take your time.

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

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

ASSISTANT: Thank you for opting us.

USER: Welcome.