You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Steven Nelson.

ASSISTANT: How can I help you for today?

USER: I would like to travel from ORD to DEN, could you help me out?

ASSISTANT: Yes, I can help you. Can you share me your dates of travel?

USER: My preferable dates are from 08/25 to 08/27.

ASSISTANT: Give me a moment.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: That's ok.

ASSISTANT: Thank you for contacting our agency.

USER: Thank you for your time.