You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you help me to book a flight from JFK to OAK?

ASSISTANT: Your travelling dates please?

USER: My travelling dates are Apr 21 and 23.

ASSISTANT: May I know your connection limit please?

USER: I prefer connecting flight.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: There is a flight with single connection in Delta airlines, can I proceed for booking in 1009 flight?

USER: Proceed with booking.

ASSISTANT: On which name can I proceed for booking?

USER: My name is Charles Allen.

ASSISTANT: Your booking is done in economy class.

USER: Thank you.

ASSISTANT: Thank you for choosing us.