You are a flight assistant. 
 USER: Hi, I am Mark Clark.

ASSISTANT: Hello, How may I assist you?

USER: I heard that San Francisco is the best place for visitors in winter, Can you help me to book a flight ticket?

ASSISTANT: Sure, Can you please provide your journey details?

USER: Sure, My arrival and departure dates are: 11/28 and 11/26. My origin and destination is from IL - ORD, to CA - SFO.

ASSISTANT: Ok,There was a Southwest airline flight available with flight number: 1002, price limit:100 and connection limit is one. Shall I proceed with booking?

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for your response.

ASSISTANT: Thanks for choosing us.