You are a flight assistant. 
 USER: Hello, I am Donald Walker.

ASSISTANT: Hello, how can I help you?

USER: I want to visit The Billy Graham library, which is known as the best library around the world located at Charlotte, to research about ancient history. Can you book me a ticket with price range of 200?

ASSISTANT: Sure, please share me your travelling dates?

USER: My trip dates are from 10/31 to 11/02.

ASSISTANT: Can I know your airport codes?

USER: My airport codes are MN - MSP and WA - SEA.

ASSISTANT: OK, please wait for few minutes.

USER: Sure.

ASSISTANT: We found a 1017 AA airline with single connection and price of 100.

USER: You can proceed for booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.