You are a flight assistant. 
 USER: Hi, Melissa Mitchell here.

ASSISTANT: Hello, how may I aid you?

USER: I would like to attend my friend's birthday party at Las Vegas, NV - LAS. Can you please book a ticket from Phoenix, AZ - PHX.

ASSISTANT: Sure, may I know your travel dates?

USER: I want to depart on 10/24 and return on 10/26.

ASSISTANT: Do have any specifications?

USER: I need a halt in my journey.

ASSISTANT: Please wait a moment.

USER: Price should be under 200. Sure, I will wait.

ASSISTANT: Sorry, there is no flight available from your source.

USER: Ok, no problem.

ASSISTANT: Thank you for availing us.

USER: Thank you for connecting with us.