You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How could I serve you today?

USER: I am planning to book a flight to reach Los Angeles, so please aid me in booking a flight from CO - DEN.

ASSISTANT: Sure, please help me with your journey dates.

USER: Sure, my journey dates are on 06/22 to 06/24.

ASSISTANT: Could you please mention your destination code?

USER: My destination airport code is CA - LAX.

ASSISTANT: Do you need any restrictions on price limit?

USER: Yes, I can pay up to 500.

ASSISTANT: There is a flight available with an airline UA of flight 1012 and price is 100. Shall I proceed with the booking?

USER: Sure, you can book it.

ASSISTANT: For further proceedings, may I have your name please?

USER: Sure, my name is Rebecca Garcia.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for choosing us.