You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

USER: Can you please help me in booking my flight ticket from JFK to BOS?

ASSISTANT: Sure, I am here to help you. When are you planning to travel?

USER: My trip dates will be May 19th to May 21st.

ASSISTANT: Is there any connection limit for you?

USER: I prefer a connecting flight.

ASSISTANT: Can I have your name please?

USER: I am Donna Perez.

ASSISTANT: Do you have any other concerns?

USER: I need a business class which should depart in the evening.

ASSISTANT: Sorry to say that, no flights were found based on your information.

USER: Its ok, thank you.

ASSISTANT: Thank you for choosing us.