You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I would like to book a ticket from OAK to MSP. Could you book a ticket?

ASSISTANT: Sure, may I know the travelling dates?

USER: Travelling dates are Nov, 18 and Nov, 20.

ASSISTANT: Do you have any connection limit?

USER: I prefer connecting flight.

ASSISTANT: Is there any other requirements?

USER: I prefer business class.

ASSISTANT: May I know your name?

USER: My name is Thomas Walker.

ASSISTANT: Sorry, no flights found with your chosen dates.

USER: Thank you.

ASSISTANT: Thank you for availing us.