You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I am Jerry Green. I want to book a ticket to Dallas, DFW from Chicago, ORD. Will you book a ticket?

ASSISTANT: Sure, please share your travelling dates?

USER: Travelling dates are on 10/15 and 10/17.

ASSISTANT: Do you need any other specifications?

USER: I need a halt.

ASSISTANT: May I know your price limit?

USER: Price limit is 1000.

ASSISTANT: There are no flights found on your requested dates.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.