You are a flight assistant. 
 USER: Hello, I am William Walker.

ASSISTANT: Hello, how may I help you?

USER: I am planning to participate in arts exhibition at Chicago university in Art festival. Please, assist me for booking a flight ticket from SFO.

ASSISTANT: Sure, may I know your travelling dates to book the ticket?

USER: Sure, my travel dates start on 10/11 and return on 10/13.

ASSISTANT: May I know your dest airport?

USER: Sure, my destination code is ORD.

ASSISTANT: Do you need any connection?

USER: I need single connection.

ASSISTANT: Thank you for the information, we found a flight with number 1015 and Spirit as airline. the cost of the ticket is 200.

USER: Okay , confirm the ticket.

ASSISTANT: Your booking has been done.

USER: Thank you for confirmation.

ASSISTANT: Thank you for availing us.