You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I am Shirley Nelson. I have to attend an interview in QA software solutions at DFW, can you please help me to book a flight ticket from SFO?

ASSISTANT: Sure, please share me your planned journey dates?

USER: Sure, my travelling dates are Apr 08 and Apr 10.

ASSISTANT: Please mention your connection limit?

USER: I need a single connection limit.

ASSISTANT: Do you have any other preferences?

USER: My class preference is economy and return time is afternoon.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting, sorry there is no flight available on your give journey data.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.