You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Catherine White.

ASSISTANT: How can I assist you today?

USER: Can you help me to find a flight with 500 price limit?

ASSISTANT: Sure, will you mention your airport codes please?

USER: My preferred airport codes are PHX and JFK.

ASSISTANT: Please provide the travelling dates of your journey.

USER: I will start my journey on 04/01 and I will be return on 04/03.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no flights found under your preferable details.

USER: Ok, no issues. Thank you for your time.

ASSISTANT: Welcome, have a great day.