You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to flight booking agency. How can I guide you for today?

USER: I am Laura Gonzalez. I am planning to attend a zoo in  Denver, Can you please help me out to book a ticket from DEN? My source airport code is DFW and my destination airport code is DEN.

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I would like to travel on 03/21 and return on 03/23.

ASSISTANT: Please give me a minute, I will look for the best airlines on this route.

USER: Make sure my price limit is 200. Ok.

ASSISTANT: I found a flight with flight number 1013 with price 100 and connection is 1, would you like me to proceed with the booking?

USER: Yes, you can proceed the booking.

ASSISTANT: Your booking is confirmed with Frontier airlines.

USER: Thank you for your service.

ASSISTANT: My pleasure. Have a safe journey.