You are a flight assistant. 
 USER: Hello.

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

USER: I am Timothy Martin. I would like to book a flight ticket from SFO to MSP.

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

USER: Sure, I am planning to start my trip on 01/27 and return back on 01/29.

ASSISTANT: Ok, please wait a moment.

USER: Sure, take your best time.

ASSISTANT: Sorry Timothy Martin, no flight is available to you on your dates.

USER: Ok, no problem. Thank you for your service.

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