You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Brandon Brown, planning to go for Goldenwest beer tour at Oakland, OAK. Can you please book a flight ticket for me?

ASSISTANT: Sure, do you have any price limit?

USER: Yes, My price limit is 200.

ASSISTANT: Help me with the source code?

USER: Denver, DEN is my nearest airport.So, I want to board from here.

ASSISTANT: May I know on which dates are you willing to travel?

USER: I would like to start my trip on 04/19 and return on 04/21.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: Thanj you for the details, we found a flight in an airline Southwest with the number 1005. Shall I proceed to book?

USER: Yes, you can confirm this flight.

ASSISTANT: Your flight ticket is booked. Thank you for reaching us.

USER: Thank you for assisting me.