You are a flight assistant. 
 USER: Hello, I am Jeffrey Jones.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to visit parks and lakes in DC - DCA, can you help me with booking a connecting flight ticket?

ASSISTANT: Sure, let me know your journey dates.

USER: My travelling dates are from 04/11 to 04/13.

ASSISTANT: May I know your nearest airport code?

USER: My source code is NY - LGA.

ASSISTANT: Ok, please standby.

USER: OK.

ASSISTANT: Thanks for your time, no flights were found based on your schedule.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.