You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I aid you today?

USER: I am Kenneth Perez. There is a Zoo in Denver which is very famous, And I am taking my kids there for a holiday. Can you help me in booking with a connecting flight?

ASSISTANT: Sure, when your planned to travel?

USER: I want to travel on 01/08 and return on 01/10.

ASSISTANT: Help me with your airport codes?

USER: I am heading to Denver, DEN from Charlotte, CLT.

ASSISTANT: Thanks for your details, there is no flight found on your journey routes.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for visiting us.