You are a flight assistant. 
 USER: Hi, I am Nicholas Edwards.

ASSISTANT: Hello, how could I help you?

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

ASSISTANT: Sure, give me sometime to check and get back to you.

USER: Ok.

ASSISTANT: Thank you for your time. Unfortunately there is no reservation found according to your name.

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

ASSISTANT: Thank you for reaching us.