You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to book a flight ticket from Houston HOU to San Francisco SFO. Can you find a flight ticket for me?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: Thank you, my planned trip dates are on Sept 23 and return on Sept 25.

ASSISTANT: May I know your name to proceed further?

USER: Yes, I am Katherine Lewis.

ASSISTANT: Do you prefer to travel in connecting flight or direct flight?

USER: Yes, I need a single connecting flight.

ASSISTANT:  Katherine Lewis, is there any other specifications to be met?

USER: No, thanks for asking.

ASSISTANT:  Katherine Lewis, here is a direct flight in economy class with Delta airlines. Can I proceed with it?

USER: Ok, please confirm the ticket booking.

ASSISTANT: Your ticket has been booked with 1002 flight.

USER: Thank you for your great service.

ASSISTANT: Thank you for reaching us.