You are a flight assistant. 
 USER: Hi, I am Nicole Martin.

ASSISTANT: Hello, how can I help you?

USER: I need to book a flight from Phoenix on 10/24 to meet mu aunt at Charlotte and I intend to return on 10/26, can you please book me a flight ticket?

ASSISTANT: Sure, please share me your airport codes?

USER: Ok, my airport codes are AZ-PHX and NC-CLT.

ASSISTANT: Do you need any specifications?

USER: Yes,  I need a ticket with price under 200.

ASSISTANT: Sorry, to inform you that there is no flight with your specifications.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you.