You are a flight assistant. 
 USER: Hi, Timothy White here.

ASSISTANT: Hello, how can I provide assistance to you?

USER: As I am a Journalist, I have a conference at Oakland to attend, so please aid me in booking a flight to CA - OAK.

ASSISTANT: Sure, can I know your origin code?

USER: My origin airport code is IL - ORD at Chicago.

ASSISTANT: Could you provide your depart and arrival dates?

USER: My depart is on 12/26 and arrival is on 12/28.

ASSISTANT: Do you have any preferences?

USER: Yes, please make sure that the price should not exceed 1000.

ASSISTANT: We found a flight on frontier airline, flight number as 1018 with the fare of 100. Shall I proceed for booking?

USER: Ok, you can book it.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for opting us.