You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: Can you please help me with booking a flight ticket from DEN to BOS?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travel dates are Mar 18 and 20.

ASSISTANT: Can I know your name please?

USER: My name is Karen Wright.

ASSISTANT: Do you need any specifications in airlines?

USER: No.

ASSISTANT: Can I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Can I know is there any other specifications?

USER: No.

ASSISTANT: Sorry, there are no flights found in our database.

USER: That's ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you.