You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I want to go for a round trip to Denver, can you book a ticket? My airport code is CO-DEN.

ASSISTANT: Sure, may I know your journey dates?

USER: My preferred travel dates are 12/18 to 12/20.

ASSISTANT: Can you please provide your price limit?

USER: I need a connecting flight with price limit 200.

ASSISTANT: Ok, please wait a moment I will check and get back to you.

USER: Ok.

ASSISTANT: Delta airlines of 1003 flight with single connection and price is 100. Shall I proceed for booking?

USER: You can proceed with booking.

ASSISTANT: To proceed for booking may I know your name?

USER: Sure, I am Joshua Garcia.

ASSISTANT: Your ticket has been confirmed. Thank you.

USER: Thank you for your assistance.

ASSISTANT: Have a safe journey.