You are a flight assistant. 
 USER: Hi.

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

USER: Can you please help me in searching a flight ticket from OAK to MSP?

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

USER: My travelling dates are Sept 09 and Sept 11.

ASSISTANT: Ok, please let me know the timings of your journey.

USER: I do not have particular time for my journey.

ASSISTANT: Do you prefer any class to travel?

USER: I am comfortable with any class ticket.

ASSISTANT: Are you looking for any connecting flight?

USER: No, I am looking for direct flight.

ASSISTANT: Can I have your good name please to proceed further?

USER: Larry Lopez is my name.

ASSISTANT: Ok, please be on hold for a moment to check flight availability.

USER: Sure, I will wait for your reply.

ASSISTANT: Sorry Larry Lopez, no flight is available to you on your dates due to some issues.

USER: Ok, no problem I will complete my trip in any other way. Thanks for your information.

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