You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I would like to attend a pioneer festival at Phoenix, PHL, so can you please book a ticket from Las Vegas, LAS?

ASSISTANT: Sure, may I know your travel dates?

USER: I want to travel on 02/25 and return back on 02/27.

ASSISTANT: Can I know your name?

USER: My name is Brian Taylor.

ASSISTANT: Ok, please wait a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry, there were no flights found on your route.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.