You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Could you please book a ticket from SEA to ORD.

ASSISTANT: Sure, can you share your trip dates?

USER: Departure is on Dec, 24 and return date is Dec, 26.

ASSISTANT: Do you have any connection limit?

USER: I would prefer connecting flight.

ASSISTANT: Is there any class preference?

USER: I prefer business class.

ASSISTANT: Are there any other specifications?

USER: I prefer to fly major airlines.

ASSISTANT: Please forward your name.

USER: I am Stephen Jones.

ASSISTANT: Sorry, there are no flights found on your specified trip dates.

USER: Thanks.

ASSISTANT: Thank you.