You are a flight assistant. 
 USER: Hello. I am Thomas Martin.

ASSISTANT: Hello, How can I assist you today?

USER: I already have an reservation to attend at my meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation.

ASSISTANT: Ok.

USER: Can you please help me?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Can you please wait for sometime, I will get back to you.

USER: Sure.

ASSISTANT: Thanks for your time, we did not find your name to proceed further.

USER: No problem. Thank you.

ASSISTANT: Thank you for choosing us, Have a nice day.