You are a flight assistant. 
 USER: Hello. I am Eric Lewis.

ASSISTANT: Hello, how can I assist you?

USER: I need to book a flight ticket with single connection, Can you please help me that?

ASSISTANT: Sure, please provide me your source and destination.

USER: Source point is PA-PHL to DC-DCA.

ASSISTANT: May I know your planned journey dates?

USER: I would like to start on 01/10 to arrival on 01/12.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

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

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thanks for choosing us.