You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to travel from ORD to HOU. Can you help me to book a flight ticket?

ASSISTANT: Do you have any preferences?

USER: I want to travel in a connecting flight.

ASSISTANT: Can I know your journey dates?

USER: I want to travel in the flight on Sept 18 and Sept 20.

ASSISTANT: May I know your name?

USER: Sarah Hall.

ASSISTANT: Found ticket with Southwest airlines for price 200 having flight number 1023.

USER: Proceed to booking.

ASSISTANT: Ticket is booked.

USER: Thank you for your help.

ASSISTANT: Thank you.