You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Myself Brandon Lee. I would like to visit Oakland to receive my relatives, can you please help me to book a flight from ORD to OAK?

ASSISTANT: Sure, when are you planning to depart and return on?

USER: Sure, my travelling dates are from July 29 to July 31.

ASSISTANT:  Is there any another specifications on your trip, so that I can arrange like that only.

USER: My departing time is afternoon.

ASSISTANT: There is a direct flight-1029 with price 100, shall I book it?

USER: Ok, please proceed for booking.

ASSISTANT: Ok, booking is done on AA airlines.

USER: Thank you for your help.

ASSISTANT: Welcome, have a safe trip.