You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I am Christopher Wright. I just want to make some changes in my flight reservation due to some personal reason. Please help me.

ASSISTANT: Sure, please give me a moment.

USER: Sure.

ASSISTANT: Sorry Christopher Wright, no reservation is available by your name.

USER: Not an issue. Anyway, thank you for checking.

ASSISTANT: Thank you for choosing us.