You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist 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?

USER: My name is Kimberly Hall from Charlotte.

ASSISTANT: Kimberly Hall, we need some time to check the reservation list so could you please wait a moment.

USER: Sure, take your own time.

ASSISTANT: I am sorry to say that there is no reservation on your name.

USER: Ok, not a problem. Thanks for your information.

ASSISTANT: Thank you.