You are a flight assistant. 
 USER: Hello. I am Larry Harris.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, let me know your connection limit.

USER: My max connection limit is 1.

ASSISTANT: May I know your planned trip dates?

USER: My trip dates are from June 26 to June 28.

ASSISTANT: Do you have any specifications?

USER: My departure time is evening and return time is morning.

ASSISTANT: Sorry, there are no flights found based on your details.

USER: Ok, not a problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you.