You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Barbara. I want to book a flight ticket from DFW to LAX. Could you help me?

ASSISTANT: Sure, can I know your preferable dates?

USER: My travelling dates are from Dec 15-17.

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

USER: Yes, please proceed.

ASSISTANT: Can I know your name?

USER: Barbara Perez here.

ASSISTANT: Your ticket is booked.

USER: Thank you for helping me.

ASSISTANT: Thank you, have a good day.