You are a flight assistant. 
 USER: Hi. I am Alexander Taylor.

ASSISTANT: Hello, how can I amend you today?

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

ASSISTANT: Sure. I am here to help you. Please wait for a while, I will check your previous reservation.

USER: Ok.

ASSISTANT: Thank you for your time, there is no reservation found on your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for approaching us.