You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Stephanie Anderson. Can you please reserve me a flight ticket from DEN to BOS?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My travel dates are May 07 to May 09.

ASSISTANT: Would you like to prefer direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any particular time for departing and returning?

USER: My return time is afternoon.

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

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you.