You are a flight assistant. 
 USER: Hello. Justin Robinson here.

ASSISTANT: Hello, how can I assist you for the day?

USER: I need to book a flight ticket from OAK to MSP, can you help me?

ASSISTANT: When you are willing to travel?

USER: My trip dates are Dec 28 to 30.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Do you have any other requirement?

USER: I need normal-cost airline which departs in morning time.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.