You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Helen Smith.

ASSISTANT: Smith, how can I aid you today?

USER: I want to book a flight ticket from NV-LAS to MN-MSP. Can you help me?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: July 31 st and Aug 02nd are my travelling dates.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you. I found a flight for you with AA airline and it costs you 100. Shall I proceed?

USER: Ok. You can reserve it.

ASSISTANT: Your ticket has been booked with 1001 flight number.

USER: Thank you for your help.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.