You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I oblige you at this moment?

USER: I have planned to go for OAK but I have an important meeting in Boston. So can you please change my existing reservation?

ASSISTANT: Sure. To change the reservation, may I have your name please?

USER: I have reserved my ticket with Patricia Thomas name.

ASSISTANT: Ok. Please wait a while.

USER: Ok.

ASSISTANT: Thanks for your time.

USER: Welcome.

ASSISTANT: You have no reservation found with your name.

USER: Ok, fine Thank you for your information.

ASSISTANT: Thank you for connecting us.