You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please book a ticket from PHL to DCA to meet my sister?

ASSISTANT: Sure, can you please let me know your trip dates?

USER: My travelling dates are Nov 17 and Nov 19.

ASSISTANT: Would you like to fly with connecting flight or direct flight?

USER: I want single connection.

ASSISTANT: Is there any other criteria?

USER: My depart time is afternoon.

ASSISTANT: If you can help me with your name, I can check with the availability of flights.

USER: I am Jason Collins.

ASSISTANT: Thanks for sharing your details, we are unable to provide flight in between your journey routes.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.