You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in booking a flight ticket from JFK to OAK?

ASSISTANT: Yes, can you share me your travelling dates?

USER: Sure, my travel dates are from Sept 25 to Sept 27.

ASSISTANT: Do you have any other specifications?

USER: I prefer economy class flight.

ASSISTANT: Do you have any preferences?

USER: I need a connecting flight with normal-cost airlines.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested criteria.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Can I know your name for documentation?

USER: Sure, myself Gregory White.

ASSISTANT: Thank you for contacting us.