You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Elizabeth Walker, do you have any direct flight from ATL to DEN?

ASSISTANT: Ok, please provide your travel dates too.

USER: My travel dates are 08/09 and 08/11.

ASSISTANT: Sorry Elizabeth Walker, there is no direct flight with your provided information.

USER: That's fine, thanks for your help and great service.

ASSISTANT: Welcome Elizabeth Walker, have a good day.