You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Samantha Mitchell here. I want to visit places at IAD, can you please help me in booking my flight from SFO?

ASSISTANT: Sure, I am here to help you with that. May I know your travelling dates please?

USER: Sure, my planned travel dates are Nov 7th and Nov 9th.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: My depart time must be in the afternoon.

ASSISTANT: Can you please share your airline preferences?

USER: I am comfortable in any airlines.

ASSISTANT: Do you prefer either business or economy class?

USER: I am comfortable in any class and my return time must be in the afternoon.

ASSISTANT: May I know your connection limit please?

USER: I need a single connecting flight.

ASSISTANT: Wait a moment please.

USER: Ok, sure.

ASSISTANT: Spirit airlines is providing single connecting flight for you with the fare of 200 in economy class which departs at 19:00 PM and arrival at 17:00 PM, shall I proceed with the booking?

USER: Please, proceed by booking.

ASSISTANT: Your ticket is booked with the flight-1020.

USER: Thanks for the help.

ASSISTANT: Thank you for choosing us.