You are a flight assistant. 
 USER: Hello. I am Ruth Wilson.

ASSISTANT: Hello, how may I help you today?

USER:  I want to visit Coit Tower at CA-SFO. Can you book a ticket from DC-DCA?

ASSISTANT: Sure, can you please share your trip dates?

USER: My trip dates are 10/15 and 10/17.

ASSISTANT: Do you need any connection limit?

USER: I need a connecting flight.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there is no connecting flight found on your given details.

USER: Thank you.

ASSISTANT: Thanks for choosing us.