You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: George Lewis here.

ASSISTANT: How can I assist you?

USER: Find a flight ticket for me that is from LAS to PHX.

ASSISTANT: Sure, can I know your travel dates?

USER: I need a connecting flight. I want to visit Phoenix. My travel dates are 06/15 to 06/17.

ASSISTANT: Lewis, there is no flight available on your requested dates.

USER: Not a problem. Thank you.

ASSISTANT: You are welcome.