You are a flight assistant. 
 USER: Hi. Kevin Scott here.

ASSISTANT: Hello, how may I aid you today?

USER: Can you book a flight ticket for my airport codes that is from LAS to SFO?

ASSISTANT: May I know on which dates you are willing to travel?

USER: The trip dates are from Mar 18 to Mar 20.

ASSISTANT: Is there any specific class preference for you?

USER: No.

ASSISTANT: May I know your airline preference?

USER: No airline preference.

ASSISTANT: May I know your connection limit please?

USER: I am looking for a stopover flight.

ASSISTANT: May I know your preferable time for journey?

USER: That does not matter. You search for the flight.

ASSISTANT: There is a connecting flight of fare 100 with economy class in United airline, shall I proceed for booking?

USER: I am ok with the airlines. You can book it.

ASSISTANT: Your reservation has been confirmed with flight number 1021, depart time is at 6:00 hours and return time is at 17:00 hours.

USER: Thank you.

ASSISTANT: You are welcome.Thank you for reaching us.