You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I am Planning to change my reservation, due to my health problem, help me in changing my reservation.

ASSISTANT: Sure, May I know your name?

USER: I am Paul Wright.

ASSISTANT: Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: Its ok, thank you.

ASSISTANT: Thank you for opting us.