You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Good Morning. May I know your name please?

USER: My name is Andrew Hall.

ASSISTANT: Ok Andrew, how can I guide you?

USER: I am planning to take my kids to Philadelphia PHL because it has many historic places, could you help me out?

ASSISTANT: Yes, it is a nice place to visit. Sure, would you please provide your preferable dates to travel?

USER: I would like to depart on 10/17 and return back on 10/19.

ASSISTANT: May I know your origin airport code?

USER: My origin airport code is EWR.

ASSISTANT: Ok Andrew, please give me a minute and I will get back to you with the available flight details.

USER: Sure, take your time.

ASSISTANT: Sorry, I could not find any flight matching with your requirements.

USER: That's so sad to hear. Thank you for your time.

ASSISTANT: Thank you, have a good day.