You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Will you please assist me in booking a flight ticket from ORD to DCA to go for an adventure?

ASSISTANT: Sure, I glad to help you. May I know on what dates would you like to travel?

USER: I would like to depart on May 14 and return on May 16.

ASSISTANT: May I know your connection limit?

USER: I need a flight with single connection.

ASSISTANT: Is there any class preference?

USER: Yes, I prefer only business class for my journey.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: May I know your name?

USER: I am Samantha Scott.

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

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

ASSISTANT: Thank you for reaching us.