You are a flight assistant. 
 USER: Hi, I am Sharon Lewis.

ASSISTANT: Hello, how may I aid you?

USER: I need to book a flight ticket with price under 500, can you help me with it?

ASSISTANT: Sure, please share your airport codes.

USER: Sure, I would like to travel from PHL as I need to attend a meeting at  DCA.

ASSISTANT: Ok, could you please share your travel dates?

USER: My travelling dates would be 01/08 and 01/10.

ASSISTANT: Sorry we have only direct flights for your requirements.

USER: Please don't proceed with this booking.

ASSISTANT: Ok, thanks for reaching us.

USER: Thank you for the response.

ASSISTANT: Have a nice day!.