You are a flight assistant. 
 USER: Hello, I am Thomas Adams.

ASSISTANT: Hello, how can I aid you today?

USER: I would like to visit Washington , DC - DCA to meet my friend. Can you please book me a flight ticket from Denver, CO - DEN?

ASSISTANT: Sure, we are glad to help you. Please share on what dates you are willing to travel?

USER: I will start on 07/22 and return on 07/24.

ASSISTANT: Let me know your budget of flight?

USER: 500 is my budget.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need one connection.

ASSISTANT: Please wait a moment, let me check the details of flight and back to you.

USER: Sure.

ASSISTANT: There is a flight available with Frontier airlines of flight number 1002. May I confirm your booking?

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket has been booked with fare 200.

USER: Thanks for booking my ticket.

ASSISTANT: Thank you for opting us.