You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: This is Larry Brown. Can you book a flight ticket from MSP to OAK?

ASSISTANT: Sure, can I know your trip dates?

USER: My travel dates are from Feb 29th to Mar 2nd.

ASSISTANT: Can I know your other requirements?

USER: I want a single pause in my journey.

ASSISTANT: Can I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: When do you want to depart and return?

USER: I want to return in the evening.

ASSISTANT: There are no flights available.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.