You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be your helping hand today?

USER: I want to change my reservation due to some work at my Office, so please aid me in changing.

ASSISTANT: Sure, we are here to help you.

USER: Thank you for considering my request.

ASSISTANT: Please provide your name to proceed further.

USER: Sure, I am Jeffrey Davis from Denver.

ASSISTANT: Ok, please give me a minute, I will check with the reservation list and revert to you.

USER: Sure.

ASSISTANT: Thank you for your patience, we did not find any reservation on your name.

USER: That's fine, thank you.

ASSISTANT: Thank you for opting us.