You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I need to attend a business meeting at Boston, can you please help me in booking a flight ticket from LAS to BOS?

ASSISTANT: Sure, may I know your trip dates please?

USER: Sure, my travel dates are from July 10 to July 12.

ASSISTANT: Can you please share your class preference?

USER: I prefer business class.

ASSISTANT: Would you like any break in your journey?

USER: No, I need a direct flight.

ASSISTANT: Any other requirements you need?

USER: No.

ASSISTANT: Let me know your name please?

USER: Myself Cynthia Martin.

ASSISTANT: Sorry, no flights found with your requirements.

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

ASSISTANT: Thank you for reaching us.