You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Will you please make me a plane reservation from SEA to BOS?

ASSISTANT: Sure, may I know your trip dates please?

USER: I will leave on Mar 20 and comeback on Mar 22.

ASSISTANT: Do you have any other requirements?

USER: I am looking for 1 stop over within my route.

ASSISTANT: Can I know your name?

USER: I am Stephen Jones.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: That's alright, thanks for your assistance.

ASSISTANT: Most welcome.