You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I support you today?

USER: I have to visit my uncle house for the family meeting, can you help me with that?

ASSISTANT: Sure, we are here to help you out. May I know your good name please?

USER: I am Nicholas Evans. I want to move from Washington, DC - IAD to Minneapolis and St. Paul, MN - MSP.

ASSISTANT: It would be great, if you can provide us with your travelling dates along with any other specific criteria to be met.

USER: my travelling dates are 01/21 and 01/23, with price of 500.

ASSISTANT: Ok, please wait for a minute I will revert you.

USER: OK.

ASSISTANT: We are sorry to inform you that I have found no flight for this preferences.

USER: Ok, thank you.

ASSISTANT: Thank you for choosing us.Have a nice day.