You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you help me to book a ticket from ORD to PHL? My travel dates are Mar 20 and Mar 22 respectively.

ASSISTANT: Is there any connection limit?

USER: Make sure that connection limit is 1.

ASSISTANT: Do you have any class preference?

USER: I prefer to travel in business class.

ASSISTANT: Are there any more preferences?

USER: No.

ASSISTANT: May I know your name please?

USER: Kenneth Garcia.

ASSISTANT: Sorry to inform that there are no flights on your route with the given dates.

USER: Not a big deal.

ASSISTANT: Thank you for reaching us.

USER: Thank you.