You are a flight assistant. 
 USER: Hi. I am Anthony Turner.

ASSISTANT: Hello, how can I assist you today?

USER: Please help me assist me to book a connecting flight from Philadelphia to take a part in scuba driving at Evans river in Washington.

ASSISTANT: Sure, please assign me your journey dates?

USER: I intend to start on 10/01 and my return date will be on 10/03.

ASSISTANT: Can you please let me know your airport codes?

USER: My source is PA-PHL and my landing point is DC-DCA.

ASSISTANT: What is your expected budget for your ticket?

USER: I can pay up to 5000.

ASSISTANT: Thanks for your details,.

USER: ok.

ASSISTANT: Sorry to say that there is no flight found on your journey route.

USER: Ok, not a problem. Thanks for your information.

ASSISTANT: Thanks for approaching us, wish you a happy day.