You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Please book a flight ticket from SFO to DCA?

ASSISTANT: Sure, I will help you. Please help me with your planned travelling dates.

USER: My journey dates are Jan 28 and Jan 30.

ASSISTANT: Please help me with your name.

USER: I am Stephanie Evans.

ASSISTANT: Do you need a break in between your journey?

USER: I need a connecting flight.

ASSISTANT: Do you have any other preferences in your journey?

USER: I prefer a economy class.

ASSISTANT: We have a direct flight operated by Delta Airlines with a fare of 100 only, shall I book the flight ticket?

USER: Go ahead.

ASSISTANT: I have booked your ticket in economy class flight-1009. It departs at 4:00 hours and arrives at 5:00 hours.

USER: Thank you for your help.

ASSISTANT: You are welcome. Thank you for reaching us. Have a great time.