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

ASSISTANT: Hello, How can I help you?

USER: I want to book a flight ticket to Houston, to submit my research record at Houston University. Can you book me a ticket from OAK to IAH?

ASSISTANT: Sure. May I know your travelling dates?

USER: I would start on 10/29 and return on 10/31.

ASSISTANT: Do you have any preferences?

USER: Yes, I need a flight with price under 500.

ASSISTANT: There is a flight 1013 in Delta airline and price 100 with a connection. Shall I proceed?

USER: Fine, please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your support.

ASSISTANT: Thank you.