You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kathleen Mitchell here.

ASSISTANT: How can I assist you?

USER: I am very interested to visit historic places, so I want to visit Martin Luther King Jr National Historic Site in Atlanta which is a famous place there, could you please help me to book a flight from DEN to ATL?

ASSISTANT: That's great to hear. To check the details of the flight, I need to know your travel dates?

USER: Sure, I am heading on 04/26 and return would be on 04/28. In middle of my journey my friend is also joined with me, so that's why I need a 1 connection flight. Can you please check for it?

ASSISTANT: I found a flight of AA airlines on your request. Shall I proceed?

USER: Ok, please proceed to book.

ASSISTANT: Your ticket is booked successfully.

USER: I will appreciate your help, thank you for booking.

ASSISTANT: You are welcome.