You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be of your service?

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

ASSISTANT: Ok, I can help you to change your reservation now. May I know your name to to check the status of your reservation?

USER: Jennifer Edwards is my name.

ASSISTANT: Ok, thank you. We couldn't find any reservation on your name to change.

USER: Ok, no problem.

ASSISTANT: Thanks for contacting us, have a nice day.

USER: Thanks for your information.