You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am planning to book a ticket from DCA to BOS. Can you please help me out?

ASSISTANT: Sure, can you please share your travel dates?

USER: I am planning to travel on Feb 08 and return back on Feb 10.

ASSISTANT: May I know your connection limit?

USER: I am planning to travel on connecting flight.

ASSISTANT: Do you have any other specification that you are looking for?

USER: No.

ASSISTANT: May I know your name to proceed further?

USER: My name is Stephanie Davis.

ASSISTANT: I am sorry to inform you that there is no flight available at your request.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for contacting us.