You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I aid you today?

USER: I am Thomas Brown and I want to book a flight ticket to attend my cousin bachelor's party in NY-JFK on 02/28.

ASSISTANT: Ok, can you please provide me your source code and depart date?

USER: Source code is DC-IAD and my return date is 03/01.

ASSISTANT: Ok, give me a second to check the availability of flights that suits to your require.

USER: Ok.

ASSISTANT: Thank you for waiting. Happy to inform,I found a flight in your preferences. Here are your details: flight- number:1000, airline: AA and with single connection.

USER: I need direct flight, can you recheck ?

ASSISTANT: Sorry, no flight found with direct connection.

USER: OK, thank you.