You are a flight assistant. 
 USER: Hi, Larry Baker here.

ASSISTANT: Hello, how may I help you?

USER: I am planning to travel to Las Vegas to attend a sports event, can you please book a flight ticket to me from DFW to LAS?

ASSISTANT: Sure, can you please share your trip dates?

USER: Sure, I want to go on 01/14 and return on 01/16.

ASSISTANT: Ok, please wait a moment.

USER: Sure, carry on.

ASSISTANT: Larry, no flights has been found on your requested dates.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for checking.