You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know, how can I serve you today?

USER: I am Paul Jones, I want to book flight ticket to Charlotte NC-CLT. Can you please help me in booking my flight ticket from Chicago IL-ORD?

ASSISTANT:  Sure, Please provide your travelling dates?

USER: 09/17 to 09/19 are my travelling dates.

ASSISTANT: Thanks for your time, no flights found on your travel dates.

USER: Its ok, thank you.

ASSISTANT: Thanks for approaching us.