You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Mary Martin.

ASSISTANT: How can I assist you today?

USER: I want to book a flight ticket from CA-SFO to MN-MSP. Can you help me?

ASSISTANT: Sure, I can help you with that. May I know your planned travel dates please?

USER: 02/29 and 03/02 and travelling dates.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: No issue. Thank you.

ASSISTANT: Thank you for reaching us.