You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I be your helping hand today?

USER: I just wants to change the reservation with the name of Jerry Martinez. As my college holidays has been postponed. Please aid me.

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: Fine.

ASSISTANT: Sorry Jerry, there is no active reservation on your name to change it.

USER: Thank you for your quick response.

ASSISTANT: Thanks for your presence.