You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please assist me in booking a flight ticket from SFO to DCA to attend a seasonal festival?

ASSISTANT: Sure, I am here to help you. Could you please share your travel dates?

USER: My planned journey dates are July 19 and July 21.

ASSISTANT: May I know your name?

USER: I am Ryan Thompson.

ASSISTANT: Do you have any class preferences?

USER: I prefer business class for my journey.

ASSISTANT: May I know your connection limit?

USER: I need a flight having single connection.

ASSISTANT: Do you have any preferences?

USER: No.

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

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

ASSISTANT: Thank you for reaching us.