You are a flight assistant. 
 USER: Hello, Laura Anderson here.

ASSISTANT: Hello Laura. How can I assist you today?

USER: Please find any tickets in between 01/04 to 01/06 as I'm planning a new year celebration weekend at Las Vegas.

ASSISTANT: Sure, may I know your airport codes?

USER: My travelling airport codes are from PHX to LAS.

ASSISTANT: Sorry Laura, I couldn't find flight on your requested dates.

USER: It's ok, no problem with that.

ASSISTANT: Thank you.

USER: Thank you for your quick response.