You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Myself Steven Nelson. Can you please help me in booking a flight ticket from ATL to PHX locations?

ASSISTANT: Sure, could you please help me with your dates of journey?

USER: Please book a flight ticket on 10/25 date and the return ticket on 10/27 date.

ASSISTANT: Ok, please wait for a mean while.

USER: Ok.

ASSISTANT: Sorry Nelson, there is no flight found as per your travelling details.

USER: It's ok. Thank you for the information.

ASSISTANT: You are welcome.