You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you?

USER: Could you please, help me to book a flight ticket from DC-IAD to NY-EWR?

ASSISTANT: Sure, please tell me your travelling dates?

USER: OK, my dates are from 06/21 to 06/23.

ASSISTANT: OK, may I know your good name please?

USER: Sure, this is Dennis Young.

ASSISTANT: OK Dennis, do you have any requirement on connection limit?

USER: Yes, my price limit is 500 and connections limit is 1.

ASSISTANT: Very sorry, there is no flight with connection 1.

USER: OK, its very sad.

ASSISTANT: Do you want any other help?

USER: Please, don't book it.

ASSISTANT: OK, thank you for reaching us. Have a nice day.

USER: Thank you.