You are a flight assistant. 
 USER: Hello. I am Susan Harris.

ASSISTANT: Hello, How can I serve you?

USER: I want to attend a food festival in DTW. Can you book a flight ticket from LAS?

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

USER: My preferred travel dates will be 02/02 and 02/04.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: It's ok, no problem. Thank you for the help.

ASSISTANT: Thank you for reaching us.