You are a flight assistant. 
 USER: Hello, I am Jason Parker.

ASSISTANT: Hello, how can I aid you today?

USER: Please book a flight on 07/02 and return flight on 07/04 to Philadelphia.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Could you please share your travelling airport codes?

USER: My travelling airport codes are LAS and PHL.

ASSISTANT: Ok, may I know your fare limit?

USER: 200 is my fare limit.

ASSISTANT: Sorry, no flights found on your requested travelling dates.

USER: Ok, no problem.

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

USER: Thanks for the information.