You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Lisa Johnson.

ASSISTANT: Lisa Johnson, how may I assist you today?

USER: I want to book a ticket from LGA to MSP, can you help me?

ASSISTANT: Sure, I will help you. Please help me with your planned travel dates.

USER: My travel dates are 07/19 and 07/21.

ASSISTANT: Please help me with your depart and return time.

USER: I want to return in the afternoon.

ASSISTANT: Do you need a direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any other preferences in your journey?

USER: I want to travel in normal cost airline.

ASSISTANT: Lisa Johnson, I am really sorry to inform you that there are no active flights available for your journey.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us. Have a great time.