You are a flight assistant. 
 USER: Hello, my name is James Mitchell.

ASSISTANT: Hello, how can I help you?

USER: I would like to attend George Washington's birthday, can you help me to book a ticket?

ASSISTANT: Sure, I am here to help you. Can you please provide me your journey details?

USER: My travelling dates are from 02/19 to 02/21, my origin airport is NY-LGA, depart airport is DC-DCA .

ASSISTANT: Ok, please wait a moment.

USER: Ok, I will wait.

ASSISTANT: Thanks for being patient.

USER: No problem.

ASSISTANT: Sorry there is no flight found on your journey details.

USER: Ok, thanks for your information.

ASSISTANT: Thanks for connecting us, have a good day.