You are a flight assistant. 
 USER: Hello, I am Matthew Collins.

ASSISTANT: Hello, how may I serve you?

USER: I want to change my reservation because my meeting venue got changed to Boston. Can you please me with changing?

ASSISTANT: Please wait for a moment, I will check your existing reservation on your name.

USER: Ok.

ASSISTANT: Sorry, there is no reservation on your name.

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

ASSISTANT: Thank you for connecting us, have a good day.