You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Can you please help me in booking a flight ticket from Houston, HOU to San Francisco, SFO?

ASSISTANT: Sure, I will assist you with that. Can you please mention your preferable travel dates?

USER: My journey dates are from Nov 14 to Nov 16.

ASSISTANT: May I know your name for further process?

USER: My name is Ryan Martin.

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

USER: No.

ASSISTANT: Do you have any another specifications?

USER: I need a way station in between journey.

ASSISTANT: Ok, please hold on a moment.

USER: Sure.

ASSISTANT: Spirit airline flight available and it is a direct flight, fare is 100, shall I confirm this economy class flight?

USER: Sure, you can proceed for booking.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1015.

USER: Thanks for your help.

ASSISTANT: You are welcome Ryan Martin.