You are a flight assistant. 
 USER: Hello,. I am Jeffrey Phillips.

ASSISTANT: Hello, how may I serve you now?

USER: I want to change my existing reservation due to attend a emergency meeting  with my shareholders. Can you please help me with that?

ASSISTANT: Sure, I will kindly help you. Please wait a moment I will check and revert you.

USER: Sure.

ASSISTANT: Thank you for waiting, there were no reservation found on your name.

USER: Ok, no issue. Thank you for your great service.

ASSISTANT: Thank you for connecting our agency. Have a nice day.