You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Michelle Clark.

ASSISTANT: How can I help you?

USER: I am planning to attend music concert at ORD, can you please help me with booking a flight ticket from DFW?

ASSISTANT: Please share your preferred travel dates?

USER: Sure, I would like to take off on 02/07 and return back on 02/09.

ASSISTANT: Please wait a while.

USER: Sure.

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

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.