You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please book a ticket from OAK to MSP to go for shopping?

ASSISTANT: Sure, please share your journey dates?

USER: My journey dates are Apr 1 and Apr 3.

ASSISTANT: Do you have any specifications?

USER: My depart time is afternoon and return time is evening.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: May I know your good name?

USER: I am Jack Wilson.

ASSISTANT: Sorry, no flights found on your given details.

USER: Ok, Thank you for your service.

ASSISTANT: Thank you for choosing us.