You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: I would like to travel to Philadelphia to meet my sister in my holidays, so can you guide me in flight ticket booking from JFk?

ASSISTANT: Sure, I am here to provide you the service. Can I have your travel dates?

USER: Thank you and I would like to travel on 06/14 and catch the return flight on 06/16.

ASSISTANT: Ok, please provide me the destination airport code.

USER: Sure, I am planning to land on PHL region.

ASSISTANT: Ok, can I have your good name please?

USER: Sure, my name is Ashley Allen.

ASSISTANT: Sorry to inform you, there is no flight with the details you have provided to me.

USER: That's fine, no problem with that one. Thank you for your help.

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

USER: Welcome.