You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I need to book a flight ticket from DEN to BOS, can you help me in booking a flight ticket?

ASSISTANT: Sure, please share your planned travel dates?

USER: Sure, my scheduled dates are Oct 19 and Oct 21.

ASSISTANT: Let me know your connection limit?

USER: I prefer maximum one connection.

ASSISTANT: Any other requirements?

USER: I would prefer return time at afternoon.

ASSISTANT: Can I have your name please?

USER: Sure, Amanda Phillips here.

ASSISTANT: Sorry, no flights found with your given details.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us.