You are a flight assistant. 
 USER: Hi. Deborah Rodriguez here.

ASSISTANT: Hello.

USER: I am Deborah Rodriguez need to visit Phoenix to discuss security issues with the government officials there. So can you book a flight ticket for me?

ASSISTANT: Sure, I am here to help you.

USER: Ok.

ASSISTANT: May I know your travel dates please?

USER: My preferable dates for travel are 01/17 to 01/19.

ASSISTANT: Ok, can you please provide your source and destination airport codes?

USER: My airport codes for boarding the flight are LAS to PHX.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Ok.

ASSISTANT: Sorry Deborah, there are no flights available on your requested dates.

USER: Ok, not a problem. Thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.