You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you now?

USER: Joseph Gonzalez here. Please change my recent reservation due to postpone of my tournament.

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

USER: Thank you.

ASSISTANT: Please be on hold for a moment to check your reservation status.

USER: Ok.

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

USER: That's ok, thank you.

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