You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello,.

USER: I am Gary Taylor.

ASSISTANT: How may I help you?

USER: Please book a ticket from Chicago, IL-ORD to San Francisco, CA-SFO.

ASSISTANT: sure, may I know your travelling dates?

USER: Travelling dates are from 02/21 to 02/23.

ASSISTANT: Thank you for the information, we found a flight with number 1028 and UA as airline.

USER: Please provide ticket fare.

ASSISTANT: Your booking is confirmed. The cost is 100. Shall I proceed?

USER: I need a connecting flight.

ASSISTANT: It is a connecting flight.

USER: Please proceed to book flight ticket.

ASSISTANT: Your booking is done.

USER: Thanks.

ASSISTANT: Thank you.