You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I need to book a ticket from DTW to IAH. Could you book a ticket?

ASSISTANT: Sure, I am happy to help you. Can you please let me know your travelling dates?

USER: Travelling dates are Jan, 22 and Jan, 24.

ASSISTANT: Do you have any other specifications?

USER: I prefer economy class.

ASSISTANT: May I know your good name?

USER: Donald Gonzalez.

ASSISTANT: We found a connecting flight in Frontier airline with a fare of 200 which departs at 12:00 and return at 0:00. Shall I proceed for booking?

USER: Please book a ticket.

ASSISTANT: Ok, your ticket is reserved in an economy class and the flight number is 1004.

USER: Thank you.

ASSISTANT: Thank you for availing us.