You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Richard Rodriguez. Can you please help me with booking a flight ticket from MSP to LGA?

ASSISTANT: Sure, may I know your trip dates please?

USER: Trip dates are 01/29 and 01/31.

ASSISTANT: Do you have any other requirements?

USER: I would like to depart at afternoon.

ASSISTANT: Ok, do you have any class preference?

USER: No.

ASSISTANT: Ok, please wait. Sorry, we regret to inform you that there is no flight available as per your request.

USER: No issues, thanks for the help.

ASSISTANT: My pleasure.