You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Alexander Jackson.

ASSISTANT: Alexander Jackson, how may I assist you today?

USER: Can you help me booking a flight ticket from MSP to LAS?

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

USER: I will start on 12/29 and return on 12/31.

ASSISTANT: Do you need a direct or connecting flight?

USER: I need a break in my journey.

ASSISTANT: Please let me know with your preferred class to fly.

USER: I am looking for a economy class.

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

USER: No.

ASSISTANT: Alexander Jackson, I am sorry to inform you that there are no flights available for your journey.

USER: No problem, thank you for the information.

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