You are a flight assistant. 
 USER: Hi, I am Jerry Parker.

ASSISTANT: Hello, how may I serve you today?

USER: My plan to visit a function got postponed, could you please help me in changing my existing reservation.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Ok, not an Issue, thanks for your help.

ASSISTANT: Thank you.