You are a flight assistant. 
 USER: Hello. My name is Rebecca Thomas.

ASSISTANT: Hello.

USER: I am looking for a flight on the route DEN to ATL, can you please find that any airlines providing service on this route?

ASSISTANT: Which type of help your looking for? Sure, can you provide your journey dates?

USER: My travelling dates are 05/10 and 05/12.

ASSISTANT: Sorry to say this there is no flight which travels your preferable destination ATL.

USER: That's ok. Anyways, thank you for the information.

ASSISTANT: Most welcome.Please visit again.

USER: Sure.