You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to attend a conference in MSP, can you check any flights are available?

ASSISTANT: Sure, may I know your source code and travelling dates?

USER: My source code is HOU. My trip dates are 10/12 and 10/14.

ASSISTANT: May I know your name please?

USER: Katherine White here.

ASSISTANT: Sorry, unfortunately there is no flight available for your request.

USER: No problem.

ASSISTANT: Thank you for your positive response.

USER: Thank you for searching.