You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to book my flight ticket from DEN to BOS.

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are from 10/11 to 10/13. Please make sure, I want a direct flight.

ASSISTANT: Sorry, there is no flight available as per your requested dates. Can I know your name?

USER: Myself Stephanie Lopez. That's fine, thank you for checking.

ASSISTANT: Most welcome.