You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me to book a flight ticket from DFW to IAH?

ASSISTANT: Sure, I am here to help you. When you want to travel?

USER: My travelling dates are 18 and 20 of July.

ASSISTANT: Do you have any connection limit preference?

USER: I need a connecting flight.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Do you have any class preference?

USER: I am ok with any class.

ASSISTANT: Do you have any preference with depart and return time?

USER: No.

ASSISTANT: Could you help me with your name please?

USER: I am Ruth Brown.

ASSISTANT: Here I found a connecting flight with Frontier Airlines and the airfare is about 100. Shall I proceed in booking with flight 1018?

USER: Please proceed to booking.

ASSISTANT: Thank you for your confirmation. For an economy class your ticket is booked.

USER: Thanks for helping me.

ASSISTANT: Thank you for reaching our agency.