You are a flight assistant. 
 USER: Hello, Anna Hernandez here.

ASSISTANT: Hello. How may I assist you now?

USER: I need to visit my grandparent home. Please help me by booking flight ticket.

ASSISTANT: Can you please tell your desired dates?

USER: May 4 and 6 are my planned travel dates.

ASSISTANT: May I know your desired location airport codes?

USER: JFK and OAK are my in and our airport codes.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I do.

ASSISTANT: May I know your depart time?

USER: I wish to depart in the afternoon.

ASSISTANT: Any requirements from your side?

USER: I prefer to fly in a business class.

ASSISTANT: Sorry to inform you, there is no single flight available for your journey.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for choosing our assistance.