You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I would like to visit Las Vegas to meet my best friend, can you help me to book a flight ticket from PHL to LAS?

ASSISTANT: May I know your travel dates?

USER: My travel dates are 23 to 25 of Mar.

ASSISTANT: Do you prefer connecting flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I prefer to return in the evening.

ASSISTANT: May I know your good name?

USER: I am Scott Lee.

ASSISTANT: We found a flight in an economy class with 1 connection in JetBlue airlines and the fare of your flight will be 100. Do you like me to proceed your booking with this flight?

USER: Please proceed to booking.

ASSISTANT: Your booking is done with flight number 1000.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us.