You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I provide assistance to you?

USER: Owing to an emergency I had to request for this change reservation,. Can you please help me to change an existing reservation?

ASSISTANT: Sure, may I know your name to check the reservation status?

USER: My name is Carol Baker.

ASSISTANT: Please hold on a moment. I will revert to you.

USER: Sure.

ASSISTANT: Thanks for waiting. There was no reservation found with your name in the list.

USER: That's not a problem.

ASSISTANT: Thank you for approaching us.