You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Thomas Moore. I am looking to book a flight ticket from DCA to LGA to meet my friend. Can you help me for booking a flight ticket?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My travelling dates are 08/16 and 08/18.

ASSISTANT: There is a flight available on your requested dates from Delta airlines.Shall I confirm your booking?

USER: I need a direct flight for my journey.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome.