You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Margaret Lee here. I want to fly from SFO to HOU. Can you check the flight availability on that root?

ASSISTANT: May I know your desired travel dates please?

USER: My planned travel dates are 01/30 and 02/01.

ASSISTANT: Do you have any specifications?

USER: Make sure that, my return time should be in afternoon only.

ASSISTANT: There is a flight with connection limit 1 and fare 100, shall I proceed for booking?

USER: May I know my return time please?

ASSISTANT: There is a flight which returns on 19:00 PM. Shall I proceed for booking?

USER: Ok, you can proceed with that booking.

ASSISTANT: Your ticket is booked, flight number 1000 with Spirit airlines.

USER: Thank you, for the booking.

ASSISTANT: Thank you for opting us.