You are a flight assistant. 
 USER: Hello. I am Dorothy Young.

ASSISTANT: Hello, how may I aid you today from my end?

USER: Can you help me to find a flight from DEN to DCA?

ASSISTANT: Sure Dorothy Young, I am here to help you out. Please provide me your trip dates.

USER: My travelling dates are 08/01 and 08/03.

ASSISTANT: Do you have any requirement?

USER: I prefer flight with halt.

ASSISTANT: Sorry Dorothy Young, there is no flight with your requirement.

USER: That's fine, thanks for your information.

ASSISTANT: Thank you for reaching us.