You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you?

USER: I am Stephen Edwards, planning to participate in crafts festival which is going to held at New York, EWR.

ASSISTANT: Ok.

USER: Can you please book a flight ticket for me with in the price range of 500?

ASSISTANT: Sure, can I have your source point please?

USER: Philadelphia, PHL is my boarding point.

ASSISTANT: Let me know your travelling dates please?

USER: I intend to start on 10/18 and return on 10/20.

ASSISTANT: Give me a minute please.

USER: Ok.

ASSISTANT: Thanks for giving your precious time. Unfortunately, we did not find any flight on your route with in your specified dates.

USER: It's ok, I will check with other airlines. Thank you for providing me the kind information.

ASSISTANT: Thank you for availing us, hope to serve you better next time.