You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you please book a ticket from DCA to CLT to go for shopping?

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

USER: My travelling dates are Nov 27 and Nov 29.

ASSISTANT: Do you have any connection limit preference?

USER: I want single connection.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Could you help me with your name please?

USER: I am Patricia Carter.

ASSISTANT: Sorry, there is no flight available for the mentioned dates.

USER: Ok, Thank you.

ASSISTANT: Thank you for reaching us.