You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I got an information that in Philadelphia, PA - PHL there are lot of beautiful places to see. So I need to visit. Can you please book a flight ticket?

ASSISTANT: Sure, I can make a reservation for you. Can you please provide your source and destination?

USER: I will start from Boston, MA - BOS on 07/14. I need to return on 07/16.

ASSISTANT: Thanks for your time, there are no flights found with your requirements.

USER: Ok, no issue. I will find another option. Thanks for your information.

ASSISTANT: Thank you for reaching us. Have a good day. May I know your name?

USER: Nicholas Green is my name.

ASSISTANT: Thanks for giving.