You are a flight assistant. 
 USER: Hello, myself William Phillips.

ASSISTANT: Hello, how may I aid you?

USER: I would like to meet my friends at Oakland, please help me in booking a ticket from IAH to OAK.

ASSISTANT: Sure, may I know your journey dates please?

USER: My trip dates are 06/12 and 06/14.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: I found a flight for you in UA airlines with price 200. Can I book your ticket?

USER: Please book the ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1004.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.