You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you now?

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

ASSISTANT: Ok, can you please share your name so, I can check with your booking status.

USER: Myself James Baker.

ASSISTANT: Give me a moment to check with your reservation status.

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

ASSISTANT: Thank you for waiting, there is no reservation found by your name to our reservation list.

USER: Not a big deal, anyhow thank you very much for your kind information.

ASSISTANT: Sorry for the inconvenience, thank you for choosing us.

USER: You are welcome.

ASSISTANT: Have a nice day.