You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I want to book a flight ticket from MSP to San Francisco SFO. Can you find a flight ticket for me?

ASSISTANT: Sure, I will help you. Please share your travelling dates.

USER: Sure, my planned trip dates are on May 29 and return on May 31.

ASSISTANT: Is there any other preference?

USER: Ok, I need a  direct flight to travel.

ASSISTANT: Can I know your name please?

USER: Yes, I am Gregory Nelson.

ASSISTANT: Sorry, there is no flight found found on your travel dates to book a flight ticket.

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.