You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a ticket from OAK to DEN, can you help me?

ASSISTANT: May I know on which dates you are willing to travel?

USER: My travel dates are 11/30 and 12/02.

ASSISTANT: Do you require any stopovers in your journey?

USER: I prefer a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: I am Mary Young.

ASSISTANT: There is a connected flight in Delta airlines with the fare 200.

USER: You can book it.

ASSISTANT: Your booking is done.

USER: Thank you for booking.

ASSISTANT: Thank you.