You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Due to some financial issues, I would like to change my existing reservation. Please help me out.

ASSISTANT: Sure, will you please give me a moment?

USER: Sure, take your time.

ASSISTANT: Please mention your name for checking the reservation status.

USER: My name is Brandon Lee.

ASSISTANT: Thanks for waiting, there is no reservation found under your name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Welcome, have a great day.