You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Donna Thomson. I have planned to spend free time with my friends in Denver, so I am searching for flight ticket.

ASSISTANT: Ok.

USER: Will you please help me with that?

ASSISTANT: Can I know your travelling airport codes?

USER: Airports codes of my travelling locations are DCA and DEN.

ASSISTANT: Ok. Can I know the travelling dates?

USER: My departure and return will be on dates of 09/18 and 09/20.

ASSISTANT: Ok. Give me a moment.

USER: Sure.

ASSISTANT: I had found a flight for you with a price of 100 and connection is 1. Can I proceed?

USER: Sure, please proceed.

ASSISTANT: Your ticket has been booked. The flight number is 1014 of Frontier airlines.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us. Have a safe journey.