You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am looking for a flight ticket with afternoon as the return time. So can you book it for me?

ASSISTANT: Sure, may I know your source and destination points?

USER: The airport codes are from BOS to OAK.

ASSISTANT: Please share me your planned travel dates.

USER: The travel dates are from 09 Sept to 11 Sept.

ASSISTANT: Do you have any other specifications?

USER: I prefer a stopover flight.

ASSISTANT: May I know your good name?

USER: I am Ronald Williams.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for reaching us.