You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Ronald Jackson. I am a sports player and I would like to visit an orphan foundation at Philadelphia in the dates of 04/10 and 04/12. Can you please help me out?

ASSISTANT: Sure, I am here to help you. Can you please provide me your origin and destination airport codes?

USER: Ok, my origin airport code is BOS and destination airport code is PHL.

ASSISTANT: Ok, please wait for a while.

USER: Ok, sure.

ASSISTANT: Sorry, there is no flight available on your preferred dates.

USER: Ok, fine thank you for checking.

ASSISTANT: You are welcome and thank you for choosing us.