You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you for the day?

USER: I am Nancy Turner. Could you please change my existing reservation due to postpone of my board meeting?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while, I will check your reservation status and revert to you.

USER: Sure.

ASSISTANT: We hardly tried to find your reservation, but no reservation has been found on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.