You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: Help me to book a ticket from ORD to BOS.

ASSISTANT: Sure, please share your travel dates.

USER: My trip dates are on Jan 16 and Jan 18.

ASSISTANT: Can I have your name please?

USER: My name is Melissa Hill.

ASSISTANT: Can I know your connection limit?

USER: I am okay with connecting or direct flight.

ASSISTANT: Can I know your class preference?

USER: I need business class.

ASSISTANT: Do you have any other specifications?

USER: My depart time is afternoon.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for connecting with us.