You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I address you?

USER: Can you please help me in booking my flight from ORD to reach SFO?

ASSISTANT: Sure, please provide your trip dates to reserve your ticket.

USER: My travelling dates are July 9th and 11th.

ASSISTANT: Can you provide your name to proceed further?

USER: Myself Helen Johnson.

ASSISTANT: Do you need any connections between your trip?

USER: I prefer a single connecting flight.

ASSISTANT: Do you have any preference in class?

USER: No.

ASSISTANT: Is there any other specifications required?

USER: I don't have any other specifications.

ASSISTANT: Spirit airlines, flight number:1000 with economy class and price:100 is going on your way, can I proceed?

USER: You can proceed by booking.

ASSISTANT: Your ticket has been booked successfully.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.