You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Myself Matthew Young from Dallas. I would like to travel from DFW to ORD for an important meeting, can you please search is there any flight available for me?

ASSISTANT: Sure, I am here to help you with that. Can I know your planned trip dates?

USER: Thank you for your positive response, I want to take off on 04/12 and please confirm my return ticket also on 04/14.

ASSISTANT: Ok Young, wait for a moment.

USER: Ok.

ASSISTANT: We are regret to say that, there are no flight's available based on your travelling dates.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.