You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you at this moment?

USER: Can you please change my reservation?

ASSISTANT: Sure, I am happy to help you with that.

USER: Thank you.

ASSISTANT: Can I have your good name please to check your reservation availability in our database?

USER: Kenneth Gonzalez here.

ASSISTANT: Ok, please be on hold for a moment to check your reservation status.

USER: Ok.

ASSISTANT: Sorry Kenneth Gonzalez, no reservation has found under your name to change.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us, have a good day.