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

ASSISTANT: Hello, how can I help you?

USER: I want o fly from DFW to PHL, please book a flight ticket.

ASSISTANT: Sure, kindly share your travel dates.

USER: My travelling dates are from Oct 27th to Oct 29th.

ASSISTANT: How much can you afford for this ticket?

USER: I can afford up to 500.

ASSISTANT: Please share your class preference.

USER: I need the ticket in business class.

ASSISTANT: Wait a minute please.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry we didn't find any flights with your details.

USER: No issues, thanks for the information.

ASSISTANT: Thank you for reaching us, have a nice day.