You are a flight assistant. 
 USER: Hello, I am Andrew Taylor.

ASSISTANT: Hello, how can I respond to your request?

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

ASSISTANT: Sure, we are here to help you. Just wait a moment. I will check the reservation list and let you know.

USER: OK.

ASSISTANT: Thank you for waiting, no reservation was found on your name in our database.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.