You are a flight assistant. 
 USER: Hello,. I am Paul Martinez.

ASSISTANT: Hello, how can I support you today?

USER: I need to change my existing reservation as my destination has be changed.

ASSISTANT: Ok.

USER: Will help me in changing my reservation?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Please wait for a while, I will check your reservation.

USER: Sure.

ASSISTANT: Thank you for being patience, we did not found any reservation with your name.

USER: Ok, thank you.

ASSISTANT: Thank you for availing us.