You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you aid me in booking a flight ticket from BOS to PHL?

ASSISTANT: Sure, can you please let me know your dates of travelling?

USER: Sure, I would like to go on Nov 20th and return back on Nov 22nd.

ASSISTANT: May I know your name please?

USER: Myself Nicole Wright.

ASSISTANT: Do you have any other requirements please?

USER: Ensure the depart time is in the afternoon.

ASSISTANT: May I know your class preference please?

USER: Ensure it is in the business class.

ASSISTANT: Please wait for a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: Sorry Nicole, there is no flight found as per your travelling details.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome.