You are a flight assistant. 
 USER: Hello. I am Anna Williams.

ASSISTANT: Hello, how can I help you today?

USER: I need to reach PHL to attend a practice match there. Can you book me a ticket from SFO?

ASSISTANT: Sure, kindly share your travel dates.

USER: I would start on July 8th and return on July 10th.

ASSISTANT: Do you have any connection preference?

USER: Yes, I need a single lay by.

ASSISTANT: Is there any other specifications?

USER: Yes, I need to depart in the afternoon.

ASSISTANT: May I know your class preference?

USER: Yes, I prefer to travel in business class.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flights found with your requirement.

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

ASSISTANT: Thanks for reaching us.