You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

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

ASSISTANT: Sure,I will help you. May I now your name please?

USER: Patrick Turner here.

ASSISTANT: Sorry, we did not find any reservation in your name.

USER: No issue, Thank you.

ASSISTANT: Thanks for your approach.