You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Justin Green this side.

ASSISTANT: How can I assist you now?

USER: I want to reserve a flight ticket for my holiday trip to Las Vegas on the dates from 05/04 to 05/06, please help me.

ASSISTANT: Sure, can you please mention the takeoff and landing airport codes?

USER: My origin airport code is DCA, and my destination airport code for this trip is LAS.

ASSISTANT: Ok, please wait for a while.

USER: Ok, please check with the flights with 1 connection only.

ASSISTANT: Based on your requirement, there is a flight 1002 in Spirit airline has the price 100. Can I proceed?

USER: You can book my reservation with this available flight for my trip.

ASSISTANT: Your ticket has been booked, have a safe journey.

USER: Thank you so much for helping me out.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: Welcome.