You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning to book a ticket from ATL to BOS. Can you please help me out?

ASSISTANT: May I know your desired travel dates please?

USER: I am planning to travel on June 09 and return back on June 11.

ASSISTANT: Do you have any specifications?

USER: I am looking for a connecting flight.

ASSISTANT: May I know your name please?

USER: My name is Sandra Jones.

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

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for opting us.