You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you?

USER: I am planning to visit Chicago,Will you help me in booking he flight ticket from BOS to ORD?

ASSISTANT: Sure. Tell me your travel dates please?

USER: My travelling dates are Sept 25 and Sept 27.

ASSISTANT: May I know your name please?

USER: Myself Benjamin Moore.

ASSISTANT: Are you looking for a stopover in your journey?

USER: I need a flight with single connection.

ASSISTANT: Any other preferences?

USER: No, thank you for asking.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

USER: Ok, not an issue.

ASSISTANT: Thank you.

USER: Thank you for your information.