You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Owing to an emergency, I would like to change my change my reservation. Can you help me?

ASSISTANT: Sure. I need your name to check for the previous reservation.

USER: Sure, my name is Barbara Carter.

ASSISTANT: Wait a minute please.

USER: Sure.

ASSISTANT: Thanks for your time. We did not find a reservation on your name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for opting us.