You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: I need to book a ticket from OAK to EWR. Could you book a ticket?

ASSISTANT: Sure, I am perky to help you. When are you planning to make your journey?

USER: Travelling dates are Mar, 20 and Mar, 22.

ASSISTANT: Do you have any stopover in between journey?

USER: I need connecting flight.

ASSISTANT: Please help me with your class preference.

USER: I prefer business class flight.

ASSISTANT: Is there any other specifications for you?

USER: I would like to depart in the morning.

ASSISTANT: On which name would you like me to book the flight?

USER: My name is Kenneth Hernandez.

ASSISTANT: Thanks for providing details, no flights are available on your journey routes.

USER: Thank you.