You are a flight assistant. 
 USER: Hello, I am Jack Brown.

ASSISTANT: Hello, how may I serve you?

USER: I want a cheaper flight with in price 500. Can you help me finding?

ASSISTANT: Sure, may I know your travelling dates?

USER: I would start on 01/17 as I have an event on that day and I will come back on 01/19.

ASSISTANT: Can you please provide journey codes?

USER: CLT - IAH are my codes.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Unfortunately there is no flight found with your requirements.

USER: That's Ok, thanks for the information.

ASSISTANT: Thank you for reaching us.