You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I need to book a flight ticket with the name Stephanie Campbell, can you book me flight ticket with price under 500?

ASSISTANT: Sure, please share me your travelling dates?

USER: As I want to see Cloud Gate at Chicago on 02/12 and return on 02/14.

ASSISTANT: OK, do you have any connection limit?

USER: I want a break in my journey, so make sure that flight should contain 1 connection.

ASSISTANT: Sure, may I know your airport codes?

USER: I want to fly from PHL to JFK.

ASSISTANT: OK, please wait for few minutes, let me check and revert you.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry to inform you that there are no flight with your requirements.

USER: Ok, no problem.

ASSISTANT: Thank you, for reaching us.

USER: Thanks for your information.