You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: I want to book a ticket from DFW to EWR. Could you book a ticket?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: Departure is Feb, 12 and return date is Feb, 14.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Sure.

ASSISTANT: I found a flight for you with Spirit Airlines and it costs you 200. Shall I proceed to reserve a seat in this direct flight?

USER: May I know depart time?

ASSISTANT: Depart time is on 18:00 PM.

USER: May I know class preference?

ASSISTANT: It is a economy class.

USER: Please do not proceed.

ASSISTANT: Ok, may I know your name please?

USER: My name is Mary Moore.

ASSISTANT: Thank you for choosing us Mary Moore, have a good day.

USER: Thanks.