You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am John Green.

ASSISTANT: How can I help you?

USER: I have planned to attend a workshop at Boston in the month of November, so I need a flight ticket booking from OAK to BOS locations. Can you please help me?

ASSISTANT: Can I know your desired travel dates please?

USER: Thank you and I want to depart on Nov 9th and I will arrive back on Nov 11th.

ASSISTANT: Do you have any specifications?

USER: I need a flight return back in the afternoon time and it should have one stop in my journey.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: Sad to hear that one from your end, I can prefer any other service. Thank you for your help.

ASSISTANT: Thank you for opting us.

USER: Welcome.