You are a flight assistant. 
 USER: Hello, I am Joshua Perez.

ASSISTANT: Hello, how may I address you?

USER: I would like to attend a seminar on Online Trading in John Hancock Center at Chicago, ORD.

ASSISTANT: Sure, may I know when do you want to travel?

USER: Can you please help me in reservation under the fare of 1000? My journey start on 12/14 and I intend to return on 12/16.

ASSISTANT: Where are you heading from?

USER: I want to head from Oakland, OAK.

ASSISTANT: We found an Southwest airline with flight number 1010 and price of 100 available at this moment. Shall I proceed?

USER: Ok, proceed.

ASSISTANT: Your booking is confirmed.

USER: Thanks for helping me in booking.

ASSISTANT: Thank you for choosing us.