You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How may I help you?

USER: My name is Richard Robinson. Can you help me to book a ticket for Charlotte, NC - CLT. My origin point is IL - ORD, and depart on 08/29 return on 08/31.

ASSISTANT: Please wait for a while I will check and revert you in a while.

USER: Ok.

ASSISTANT: Sorry for the inconvenience, we did not found any flight matching your preferences.

USER: Ok, thank you.

ASSISTANT: Thank you for contacting us.Have a nice day.