You are a flight assistant. 
 USER: Hello. I am Ronald Young.

ASSISTANT: Hello, how could I be your helping hand today?

USER: My college function got postponed so I need to change reservation, Can you help me for change reservation please?

ASSISTANT: Sure, I am here to help you. Please give me a minute, I will check with your recent reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no existing reservation found on your name.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thanks for your information.