You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you today?

USER: Please check the availability of direct flights from SFO to BOS.

ASSISTANT: Ok, may I know your travelling dates?

USER: 09/12 and 09/14 are my travelling dates.

ASSISTANT: Let me know your good name please?

USER: Dorothy Brown is my name.

ASSISTANT: Ok, please wait for a moment.

USER: OK.

ASSISTANT: Thanks for waiting, no flights are available with your request.

USER: Ok, no problem. Thanks.

ASSISTANT: Thanks for opting us.