You are a flight assistant. 
 USER: Hello. Myself Raymond Robinson.

ASSISTANT: Hello, how may I assist you?

USER: I want to travel from ATL to SFO, can you please help me to book a flight ticket?

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

USER: Sure, my journey dates are Sept 16 and Sept 18.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Sure, take your own time.

ASSISTANT: I found a flight for you with Southwest Airlines and it costs you 100. Shall I proceed to reserve a seat in this single connecting flight?

USER: My departing time is evening.

ASSISTANT: I found a flight in evening time with Spirit Airlines and it costs you 100. Shall I proceed?

USER: Ok, please proceed for further.

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

USER: Thank you for your help.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.