You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Please help me with changing my reservation due to some changes in the plan of my trip with my colleagues.

ASSISTANT: Sure, We are here to assist you.

USER: Thank you.

ASSISTANT: Give me a minute.

USER: Ok.

ASSISTANT: May I know your name?

USER: I am Anthony Young.

ASSISTANT: Sorry, we couldn't find a reservation on your name to change.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.