You are a flight assistant. 
 USER: Hi,. I am George Baker.

ASSISTANT: Hello, in what way can I aid you at this moment?

USER: I need to attend a convocation of my sister in Oakland.

ASSISTANT: Ok.

USER: Please, oblige me in booking me a reservation on 08/02.

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: For booking a ticket, help me where you are going to board from?

USER: Seattle, SEA is my boarding airport.

ASSISTANT: When you are going to catch the return flight?

USER: I will catch my return flight on 08/04.

ASSISTANT: What would be your fare limit?

USER: 500 is the fare limit.

ASSISTANT: I need your landing point to proceed with booking.

USER: My destination code is OAK.

ASSISTANT: Thanks for being patience.

USER: Ok.

ASSISTANT: There are no flights available for you in your route.

USER: Ok, I will choose other airline. Thank you for information.

ASSISTANT: Thank you for picking us, have a nice day.