You are a flight assistant. 
 USER: Hello, my name is Jennifer Martinez.

ASSISTANT: Hello, How may I aid you?

USER: I have some personal matters that need fixing, so I want to change an existing reservation.

ASSISTANT: Sure, Please wait a moment, I will check and get back to you.

USER: Ok, I will wait.

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

USER: No problem, thank you.

ASSISTANT: Thank you for approaching us, Have a great day.