You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Cynthia Lewis.

ASSISTANT: How can I assist you Lewis?

USER: I am planning to visit Las Vegas this weekend, can you please book me a ticket from HOU to LAS?

ASSISTANT: May I know your travel dates?

USER: My planned dates of journey are from 02/28 to 03/01.

ASSISTANT: Sorry Cynthia, there is no flight available on your route.

USER: Ok, not an issue. I will find any alternate for this trip. Thank you for providing information.

ASSISTANT: Most welcome, have a nice day.