You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Charles Hernandez.

ASSISTANT: How may I assist you at this moment Charles?

USER: I am planning to book a ticket to attend a meeting at DFW. Can you please help me out to book a flight ticket from DCA?

ASSISTANT: Sure, I will help you with that. Can you please provide your preferable take off and landing dates for booking?

USER: I would like to travel on 05/05 and return back on 05/07.

ASSISTANT: Please wait a moment to check the flights availability in your route.

USER: Sure, I will wait for your reply.

ASSISTANT: Based on your information, I have found a flight with 1 connection with the fare of 200 provided by Spirit airlines. Shall I proceed with this?

USER: Please proceed the booking.

ASSISTANT: Ok, your ticket has been booked in flight number 1007.

USER: Thank you for your service.

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