You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Katherine Scott here.

ASSISTANT: Yes Scott.

USER: I am looking for a flight from LAX to PHX, can you please help me in booking a flight ticket?

ASSISTANT: Sure, I will help you for booking. Can you please provide me your travelling dates?

USER: My trip dates are from 08/16 till 08/18.

ASSISTANT: Ok, give me a moment.

USER: My price limit is 200.

ASSISTANT: Sorry, there is no flight is available on your route.

USER: It's ok, thank you for checking.

ASSISTANT: Welcome. Thank you for choosing us.