You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I oblige you today?

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

ASSISTANT: Sure, we are here to help you to change it. To proceed further, may I know your name?

USER: My name is Margaret Campbell.

ASSISTANT: Thanks for providing your name, please wait.

USER: Ok.

ASSISTANT: Thanks for your time, there was no reservation found on your name to change it.

USER: Thanks.

ASSISTANT: Thank you for approaching us.