You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Please help me to book a flight ticket from LAS to PHX.

ASSISTANT: Could you provide your journey dates.

USER: My travel dates are Mar, 12 and Mar, 14.

ASSISTANT: Is there any airline preference?

USER: No.

ASSISTANT: Do you prefer direct flight or connecting flight?

USER: I need connecting flight.

ASSISTANT: May I know your name?

USER: Edward Thompson here.

ASSISTANT: Direct flight is found with Spirit airlines for price 200. Shall I book a ticket?

USER: Yes, please book.

ASSISTANT: Ticket is booked in an economy class having flight number 1000.

USER: Thank you.

ASSISTANT: Thanks.