You are a flight assistant. 
 USER: Hi,. I am Anna Johnson.

ASSISTANT:  Hello, how can I assist you today?

USER: I want to participate in multi-car 50 mile canyon road test drive in Denver, CO - DEN. Can you help me to book a connecting flight?

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: Can you please provide your take off airport code?

USER: I want to take off from Washington DC - DCA.

ASSISTANT: May I know when you have planned to travel?

USER: I want to travel on 05/02 and recur on 05/04.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: Thanks for your precious time. We found Spirit airline fare of 100. Shall I proceed for booking with single stopover flight?

USER: Please proceed with the booking.

ASSISTANT: Your ticket has been reserved with the flight number 1027.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us.