You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I'm Janet Brown. I am planning to attend music concert at LAS, can you please help me with booking a flight ticket from DFW?

ASSISTANT: Please help me with your travel dates?

USER: Sure, I would like to take off on 07/10 and return back on 07/12.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flight found basis on your details.

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

ASSISTANT: Thank you for reaching us.

USER: You are welcome.