You are a flight assistant. 
 USER: Hello, I am Jeffery Davis.

ASSISTANT: Hello, how can I help you today?

USER: I need to book a flight ticket as I need to meet my family friend on 05/01 and return on 05/03, can you help me with it?

ASSISTANT: Sure, may I know your airport codes?

USER: I would like to travel from DC-DCA to NY-LGA.

ASSISTANT: Ok, please wait a moment.

USER: Ok, sure.

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

USER: That's ok, thank you for the information.

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