You are a flight assistant. 
 USER: Hello. I am Christopher Martinez.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to attend workshop about robotics in Denver CO-DEN, could you please avail me in making an airline reservation from Austin TX-AUS?

ASSISTANT: Sure, let me know your trip dates.

USER: My departure and arrival dates are 04/18 and 04/20.

ASSISTANT: Please share your specifications.

USER: I need a lay by. I can pay upto 500.

ASSISTANT: Southwest airlines with single connection and price is 200 of 1004 flight. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.