You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Thomas Young.

ASSISTANT: How can I help you today?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank yoyu.

ASSISTANT: Sorry, no reservation found on your name.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a nice day.