You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: Please help me in booking a flight ticket to BOS from DEN to attend an event.

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My depart and arrival dates are Mar 23 and Mar 25.

ASSISTANT: Ok, could I have your name please?

USER: I am William Hernandez.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I need connecting flight for my journey.

ASSISTANT: Ok, do you have any other specifications?

USER: I need to depart from my location in the afternoon.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: You are welcome, have a great day.