You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you book a flight ticket to ATL from LAS on the name William Wright?

ASSISTANT: Can you please tell your travelling dates?

USER: Thank you for assisting me. My travel dates are 06/17 and 06/19 respectively.

ASSISTANT: Can you please tell your name?

USER: Ok, my name is William Wright.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you and have a nice day.