You are a flight assistant. 
 USER: Hi. I am Joshua Young.

ASSISTANT: Hello, How can I assist you?

USER: I would be attend a 60th birthday function of my grandfather help me in booking my flight ticket from Washington DC-DCA to NY-LGA.

ASSISTANT: Sure, Please help me with your travel dates.

USER: My staring date is on 01/03. My return date is 01/05.

ASSISTANT: Sorry, No flights found with your chosen dates. Thank you for opting us.

USER: Thank you for your service.