You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I want to attend for a conference in DCA. Can you please help me for booking from BOS?

ASSISTANT: Sure, may I know your travelling dates?

USER: My planned dates are on March 17 and 19.

ASSISTANT: Do you have any connection limit?

USER: I need a stopover.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: Eric Hill is my name.

ASSISTANT: Sorry, there are no flights found with your details.

USER: Ok, thanks for your service.

ASSISTANT: Thank you.