You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Eric Lee. I need your help in booking a flight ticket from DTW to PHX.

ASSISTANT: Sure, I will help on it. Can I know your journey details?

USER: Sure, my departure date is on 08/16 and the return date is on 08/18.

ASSISTANT: Unfortunately no flights found on your journey dates. Have a great day a head.

USER: That's really sad. Anyways, thank you for your help.

ASSISTANT: It's my pleasure Eric Lee.