You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Carol Edwards.

ASSISTANT: In which way I can aid you at this moment?

USER: Due to some business meeting, I am going to change my reservation. Can you please help me for this?

ASSISTANT: Sure, I will help you with that. Please wait a moment, I will check your previous reservation status.

USER: Sure, I will wait for your kind response.

ASSISTANT: There is no previous reservation available under your name.

USER: Not a big problem, anyway thank you very much for your service.

ASSISTANT: Thank you for contacting us, have a nice day.