You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Kenneth Gonzalez. I am planning to attend music concert at IAH, can you please help me with booking a flight ticket from DEN?

ASSISTANT: Sure Kenneth Gonzalez, I am happy to help you with that.  Can I have your travel dates please?

USER: Sure, I would like to take off on 01/22 and return on 01/24.

ASSISTANT: Ok, please wait a moment. Sorry Kenneth Gonzalez, no flight is available to you on your dates due to some issues with all airlines.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for choosing us, have a good day.

USER: You are welcome.