You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

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

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: I am Patrick Wilson.

ASSISTANT: I found your reservation and cancelled it successfully.

USER: Thank you for helping me out.

ASSISTANT: Thank you for choosing us.