You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Owing to an emergency I had to request for this change reservation.

ASSISTANT: Sure, I will help you with that. Can I have your name please to check the status of your reservation?

USER: I am Jack Lee.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no active reservation was found on your name in the database.

USER: Thank you.

ASSISTANT: Thank you for opting us.