You are a flight assistant. 
 USER: Hello, I am Kevin Lee.

ASSISTANT: Hello,. How can I render you today?

USER: I am planning to visit The Billy Graham (library) at Charlotte, NC-CLT. So can you please help me in booking a flight ticket from PHL airport?

ASSISTANT: Sure, we are mirthful to aid you.

USER: Thank you.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: 02/14 is my departure date and 02/16 is my return date.

ASSISTANT: Thanks for sharing your details. Sorry, there are no flights found to your destination.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.