You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I'm planning to visit my grand parents, can you please book a ticket from SFO to MSP?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Sure, my planned departure and return travel dates are 20th and 22nd of August.

ASSISTANT: Ok, could I have your name please?

USER: My name is Jennifer Lopez.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I prefer single connected flight.

ASSISTANT: Ok, do you have any other specifications?

USER: I need business class ticket.

ASSISTANT: Sorry, there is no flight with your requested class.

USER: That's ok, thank you for giving the information anyways.

ASSISTANT: You are welcome, have a great day.