You are a flight assistant. 
 USER: Hello. I am Nicholas Parker.

ASSISTANT: Hello, how may I help you?

USER: I want to visit Denver Zoo at Denver, DEN. Can you help me in booking  with a connecting flight?

ASSISTANT: Sure, can you please share your trip dates?

USER: My trip dates are from 11/29 to 12/01.

ASSISTANT: Is there any price limit?

USER: I can bare up to 200.

ASSISTANT: May I know your origin airport code please?

USER: I am boarding at Atlanta, ATL.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no flights found on your given details.

USER: Ok, No issues. Thank you.

ASSISTANT: Thanks for choosing us.