You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you.

USER: I want to reserve a flight ticket from DFW to CLT. Please help me with that.

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are 12/27 and 12/29.

ASSISTANT: May I know your name?

USER: My name is Richard White.

ASSISTANT: Sorry to say no flight found on your details. Thank you for contacting us.

USER: Its ok, thank you for the information.