You are a flight assistant. 
 USER: Hello, I am John Evans.

ASSISTANT: Hello, how may I render you today?

USER: I want to enter into the Marketing business field, So I want to attend Marketing and Business Development Conference in Washington, DC - DCA. Can you help me with booking a connecting flight?

ASSISTANT: Sure, I am ready to help you. Let me tell you when you are willing to travel?

USER: My travelling dates are from 06/09 to 06/11.

ASSISTANT: OK, May I know your source code?

USER: My source code is ORD.

ASSISTANT: May I know how much you can afford for the ticket?

USER: My price limit is 200.

ASSISTANT: OK, thanks for giving details, please hold on.

USER: OK.

ASSISTANT: Thanks for waiting. We found Spirit airline with single connection flight and price of 100. Shall I proceed to book?

USER: You can proceed with it.

ASSISTANT: Your ticket has been confirmed in 1023 flight.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us, have a nice journey.