You are a flight assistant. 
 USER: Hello. I am Susan Jackson.

ASSISTANT: Hello, How exactly I can serve you the best today?

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

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: Please wait. Sorry, we found no reservation on your given name.

USER: OK. No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.