You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: My name is Katherine Miller. I want to book a flight ticket from CA-SFO to NY-JFK for attending a seminar in New York. I want direct flight.

ASSISTANT: Could you please send me your travelling dates?

USER: My departure day is 01/27, return day is 01/29. My price limit is 200.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Thanks for being waiting. Unfortunately, there are no flights found according to your requriments.

USER: No problem, thank you.

ASSISTANT: Thank you.