You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Matthew Thomas. Find a flight ticket from ORD to ORD. As I have to attend a business meeting with my business partner.

ASSISTANT: May I know your travel dates please?

USER: My travelling dates are 07/21 to 07/23.

ASSISTANT: There is no flight available on your desired travel dates.

USER: No problem, thank you for your time.

ASSISTANT: Thank you for reaching us.