You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Jonathan Mitchell here.

ASSISTANT: Yes.

USER: I am planning to book a flight ticket from IAD to ORD, can you help me?

ASSISTANT: Please tell your travelling dates?

USER: My travelling dates are from 04/24 to 04/26. Make sure I need my ticket fare must be within 200.

ASSISTANT: AA airline is providing a direct flight, is it ok for you?

USER: I need only 1 connected flight.

ASSISTANT: Sorry, there are no flights with 1 connection.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you and have a nice day.