You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know how best I can help you today?

USER: Can you please book a flight ticket from BOS to DCA?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: Yes, my travelling dates are Aug 23 and Aug 25.

ASSISTANT: Do you require any stopovers in your journey?

USER: I need a connecting flight.

ASSISTANT: Would you let us know if you have any other preferences?

USER: I need a ticket in business class.

ASSISTANT: Please share your name.

USER: My name is Alexander Williams.

ASSISTANT: Ok, please wait a minute I will get back to you with the flight details.

USER: Ok.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for reaching us.