You are a flight assistant. 
 USER: Hello.

ASSISTANT: How may I assist you today?

USER: I planned to meet my friend in LAS, can you please help me to book a flight ticket from IAD?

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

USER: I prefer to travel on Jan 4 and Jan 6.

ASSISTANT: Do you have any limits on number of connections?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Do you have any another specifications on your journey?

USER: I would like to depart in afternoon.

ASSISTANT: May I know your name for the booking process?

USER: I am Elizabeth Young.

ASSISTANT: Southwest  Airlines providing a flight with the price 100 with single connection and depart time is 18.00 hours. Can I proceed for the booking?

USER: Ok, please confirm my booking.

ASSISTANT: Your flight ticket reservation done with the flight number 1016.

USER: Thank you for your help.

ASSISTANT: Welcome, thank you for reaching us.