You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you please help me in booking a flight ticket from SFO to DEN to go for an adventure?

ASSISTANT: Sure, can I know your travelling dates?

USER: My planned journey dates are from Feb 23 to Feb 25.

ASSISTANT: Can I know your connection limit?

USER: I need a flight having single connection.

ASSISTANT: Do you prefer any particular class?

USER: I prefer business class.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: There are no flights available on your travelling dates.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Can I know your name, please?

USER: I am Catherine Thomas.

ASSISTANT: Thank you for choosing us.

USER: Thank you.