You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: Jessica Walker here.

ASSISTANT: Ok.

USER: I would like to visit DCA to meet my uncle, can you help me to book a flight ticket from DFW?

ASSISTANT: Sure, can I know your preferable dates?

USER: My travelling dates are 28 and 30 of Aug.

ASSISTANT: I found an economy class ticket in UA airlines with normal cost of 100 and it is a single connecting flight. Can I book your ticket?

USER: Ok, proceed with the booking.

ASSISTANT: Your ticket is booked with flight 1020.

USER: Thanks for aiding me.

ASSISTANT: Thank you.