You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how  can I help you?

USER: I am Jason Williams, I want a ticket for Atlanta,GA-ATL to visit Delta Flight Museum. My travel date are, depart on 01/03 and return on 01/05.

ASSISTANT: OK, provide me your origin point.

USER: I will take flight from Denver,CO-DEN.

ASSISTANT: OK, wait a minute.

USER: Ok.

ASSISTANT: Sorry, to inform you that there no flight found with your given details. Thank you, for reaching us.

USER: Ok, thank you for helping me.