You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you at this moment?

USER: I need to book a flight ticket from LAS to IAD, Can you please help me for booking?

ASSISTANT: Sure, may I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: Sure, can you please provide your travelling dates?

USER: I would like to travel on 03/19 to return on 03/21.

ASSISTANT: Ok, do you prefer any lay by in between the journey?

USER: I need a connecting flight.

ASSISTANT: Can I have your good name please?

USER: Daniel Nelson here.

ASSISTANT: We found a Southwest airlines with fare of 100 and a break in between the journey matches your schedule.

USER: Ok, proceed for booking.

ASSISTANT: Your ticket has been confirmed with flight number 1021.

USER: Thanks for your information.

ASSISTANT: Thank you for reaching us.