You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I would like to visit at Houston to meet my best friend, can you help me to book a flight ticket from DTW to IAH?

ASSISTANT: Sure, may I know your planned trip dates?

USER: I want to take off on 07 Mar and return on 09 Mar.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you have any other specifications?

USER: I would like to return in the afternoon.

ASSISTANT: Please forward your name.

USER: I am Joshua Baker.

ASSISTANT: We found a connecting flight of fare 20 with airline Spirit and number 1007. Shall I proceed?

USER: Please proceed to booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for helping me.

ASSISTANT: Thank you.