You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brenda Clark.

ASSISTANT: How may I assist you?

USER: Please help me in finding a flight with in price 200.

ASSISTANT: Sure, may I know your airport codes?

USER: I need to reach ORD to exhibit my painting sin art gallery and I would be flying form PHX.

ASSISTANT: On which dates would you like to travel?

USER: My depart is on 12/19 and arrival is on 12/21.

ASSISTANT: Sorry there is no flight on your details.

USER: It's Ok, thanks for your assistance.

ASSISTANT: Thank you.