You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you for the day?

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

ASSISTANT: Sure, I will help you with that. May I know your good name?

USER: I am Catherine Harris.

ASSISTANT: Please wait for a couple of minutes.

USER: Ok.

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

USER: Thanks.

ASSISTANT: Thank you for connecting with us.