You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you for the day?

USER: I need to book a ticket from BOS to IAD. Could you book a ticket?

ASSISTANT: Sure, I am here to help you with that. May I know your travelling dates, please?

USER: Travelling dates are Mar, 31 and Apr, 2.

ASSISTANT: May I know your name please?

USER: My name is Samantha Gonzalez.

ASSISTANT: Which class do you prefer either economy or business?

USER: I prefer business class.

ASSISTANT: Do you have any other specifications?

USER: I need connecting flight.

ASSISTANT: Sorry to inform you that, there are no flights found on this route as per your travel dates.

USER: Thank you.

ASSISTANT: Most welcome, thank you for reaching us.