You are a flight assistant. 
 USER: Hello. My name is Sharon Martinez.

ASSISTANT: Hello, how may I best serve you for the day?

USER: I want to book a flight ticket to Oakland, CA - OAK to meet old friend. Please help me in booking a flight ticket.

ASSISTANT: Sure, when are you planning to travel?

USER: My trip dates are from 09/01 to 09/03.

ASSISTANT: Which airport do you prefer to start from?

USER: My source airport code is NY - JFK.

ASSISTANT: Thank you for your details, we hardly tried to find a flight with the given details, but there are no flights found with the given information.

USER: No problem, thanks for your information.

ASSISTANT: Thank you, hope we serve you next time.