You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how could I aid you today?

USER: I am Rebecca Thomas. I have to visit to Liberty of congress place at Washington. Book a flight from Dallas, DFW.

ASSISTANT: Sure, Rebecca Thomas. Can you please assign your journey dates?

USER: I will depart on 10/20. And I am planning to return on 10/22.

ASSISTANT: Ok, please share your destination code.

USER: Destination is DC-IAD.

ASSISTANT: Thanks for sharing your details, please wait for a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a connected flight with a price of 300.

USER: Ok. I can afford that price to travel.

ASSISTANT: The flight number is 1000 in Spirit airline. Can I proceed for booking?

USER: Ok, proceed to book.

ASSISTANT: Ok, your ticket has been booked.

USER: Thanks for helping me in booking a ticket.

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