You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of help you are looking for?

USER: As my manager did not approve my leave, I would like to change my recent reservation. Can you aid me with this?

ASSISTANT: Sure, we will help you to change your reservation.

USER: Thank you.

ASSISTANT: May I know your name to check your reservation status?

USER: Myself George Lee.

ASSISTANT: Ok, please be on hold. Thank you for your patience.

USER: Welcome.

ASSISTANT: Sorry, we could not find any reservation with your name in our portal.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for connecting with us.

USER: Welcome.