You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Can you please help me in booking a flight ticket from BOS to DCA?

ASSISTANT: Sure, may I know your travelling dates?

USER: My trip dates are 11/22 - 11/24.

ASSISTANT: Do you have any requirements?

USER: My return time should be in the afternoon.

ASSISTANT: Can I know your name?

USER: Patricia Adams here.

ASSISTANT: Let me know your connection limit?

USER: I need a single connection.

ASSISTANT: Sorry to say, no flight is available for you.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.