You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: I want to book a ticket from PHX to ORD. Could you book a ticket?

ASSISTANT: Sure, could I have your trip dates, please?

USER: Departure date is Oct, 4 and return is Oct, 6.

ASSISTANT: Do you prefer a connecting or direct flight?

USER: I would be comfortable with single stop over.

ASSISTANT: Are there any more specifications?

USER: I prefer economy class.

ASSISTANT: On what name, do I need to reserve the ticket?

USER: I am Christopher Young.

ASSISTANT: We found a connecting flight 1020 from Southwest airline with a fare 100. Shall I proceed?

USER: Please book a ticket.

ASSISTANT: Your ticket has been confirmed in economy class.

USER: Thank you.

ASSISTANT: Thank you for choosing us.