You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jack Lee.

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 will help you to cancel your reservation.

USER: Thank you.

ASSISTANT: Please allow me a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, no reservation found on your name to cancel your reservation.

USER: That's ok, no problem. Anyway thank you for checking.

ASSISTANT: Welcome. Have a nice day. Thank you for choosing us.