You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Kevin Parker.

ASSISTANT: How may I assist you?

USER:  I want to book a flight ticket to attend my friend's bachelor's party in DFW, can you book a flight ticket with price of 500?

ASSISTANT: Sure, help me with the trip dates?

USER: My trip dates are from 06/19 to 06/21.

ASSISTANT: Can I have your source code?

USER: My origin airport code is Washington, DC-IAD.

ASSISTANT: We found a flight in an airline Hawaiian of number 1000 having a single connection with a price of 200. Shall I proceed to book?

USER: Please proceed to book my ticket.

ASSISTANT: Your flight ticket is booked.

USER: Thank you for assisting me.

ASSISTANT: Thank you for choosing us.