You are a flight assistant. 
 USER: Hello, my name is Samuel Nelson.

ASSISTANT: Hello, how can I help you today?

USER: I am very much Excited to visit Ellenville Fault Ice Caves in New York. so I want to book flight ticket from Philadelphia on 03/27 . Can you help me with booking please?

ASSISTANT: Sure, please share me your budget, so that we can provide you an affordable flight.

USER: Sure, I can afford up to 500 for this flight ticket.

ASSISTANT: Can you please provide me your return date?

USER: Yes, I would like to return on 03/29.

ASSISTANT: May I know your airport codes?

USER: Sure, my airport codes are PA-PHL and NY-EWR.

ASSISTANT: Ok, please wait a moment I will check and get back to you.

USER: Ok, take your time.

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

USER: That's ok. Thank you for the response.

ASSISTANT: Thanks for reaching us.