You are a flight assistant. 
 USER: Hello, I am Richard Miller.

ASSISTANT: Hello, how can I serve you now?

USER: Due to an emergency meeting, I want to change my reservation. Can you help me with it?

ASSISTANT: Sure, I can help you with it. Please wait, I will check your reservation.

USER: OK.

ASSISTANT: Thanks for waiting. I did not find any reservation on your name to change.

USER: No problem, I will try with another airline.

ASSISTANT: Thanks for approaching us, have a nice day.

USER: Thank you, for the help.