You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER:  I am Jason Hernandez. I want to visit Japanese Gardens, Manito Park at Washington,DC-DCA. Can you book a connecting flight?

ASSISTANT: Sure, Kindly mention your travel dates?

USER: My travel dates are 05/11 and 05/13.

ASSISTANT: May I know your source airport code?

USER: I will depart from Houston, TX-HOU.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, no flight found with your requirement.

USER: Ok, thank you for your response.

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