You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Anthony Lewis.

ASSISTANT: How may I help you?

USER: I am looking for a flight from OAK to JFK, can you find me a best flight in my route?

ASSISTANT: May I know your travelling dates?

USER: My trip dates are from 02/04 till 02/06.

ASSISTANT: Sorry, there is no flight found with your preferences.

USER: That's ok, no problem. Thank you.

ASSISTANT: Welcome, have a good day.