You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is George Allen.

ASSISTANT: How may I aid you today?

USER: Please book me a plane ticket from CLT to ORD.

ASSISTANT: Sure, I will help you with booking, may I know your travelling dates?

USER: Sure, my preferable travelling dates are from 03/24 to 03/26.

ASSISTANT: Please hold on for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, no flights as per your details.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.