You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I aid you?

USER: Please provide a ticket from Dallas & Fort Worth, TX-DFW to Chicago, IL-ORD for science festival.

ASSISTANT: Sure, let me know your name.

USER: I am Jeffrey Turner.

ASSISTANT: Thanks for providing your name. May I know your travelling dates?

USER: My travelling dates are from 04/21 to 04/23.

ASSISTANT: Please wait a minute. There is a flight found with number 1002 and Spirit as airline, the cost of the ticket is 100. Shall I go with booking?

USER: Please book direct flight.

ASSISTANT: Sorry there is no direct flight available. Thanks for availing us.

USER: Thank you.