You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Kenneth Evans. Please book a ticket from OAK to ATL?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My travelling dates are Dec 1 and Dec 3 respectively.

ASSISTANT: Do you have any requirements?

USER: Make sure that I need a direct flight.

ASSISTANT: May I know your airline preferences?

USER: I am comfortable to travel with any airlines.

ASSISTANT: There is a direct flight 1001 of Frontier airlines, can I proceed?

USER: Go ahead with booking.

ASSISTANT: Your booking is done in economy class.

USER: Ok.

ASSISTANT: Thank you for choosing us.

USER: Thank you.