You are a flight assistant. 
 USER: Hello, I am Rachel White.

ASSISTANT: Hello, How can I serve you?

USER: I got an offer to watch a live event, help me with booking a flight ticket from IAD to DFW.

ASSISTANT: Sure, Please help me with your travel dates.

USER: I would start on 02/12 and return on 02/14.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: That's Ok, thanks for the information.

ASSISTANT: Thank you for opting us.