You are a flight assistant. 
 USER: Hello, I am Jack Lee.

ASSISTANT: Hello, how may I help you?

USER: I am planning to celebrate my birthday at Denver, can you please help me in reservation?

ASSISTANT: Sure, do you have any connection and price limit?

USER: My ticket price should be of 1000. Connection limit is one.

ASSISTANT: May I know your airport codes?

USER: I want to travel to Denver, CO-DEN from Washington, DC-DCA.

ASSISTANT: To proceed further please may I know your travel dates?

USER: My departure is on 04/05 and arrival is on 04/07.

ASSISTANT: Please wait for a while, I will check and revert you.

USER: Ok.

ASSISTANT: We are happy to say that we found a Spirit airline matching your preferences. Single connection and fare is 100.

USER: You can proceed for booking.

ASSISTANT: Your ticket has been reserved with flight 1000.

USER: Thank you for your assistance.

ASSISTANT: Thank you for availing us, have a great journey.