You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I want to travel from LGA to OAK. Can you help me to book a flight ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: I want to travel in the flight on Dec 27 and Dec 29.

ASSISTANT: Do you have any specifications?

USER: I want to travel in a connecting flight.

ASSISTANT: May I know your name?

USER: John Brown.

ASSISTANT: Ok, please wait a minute.

USER: I prefer normal-cost airline.

ASSISTANT: We found an airline AA with flight 1001 having a fare 900 with stopover in business class.

USER: Proceed to booking.

ASSISTANT: Your booking has been processed.

USER: Thank you for your help.

ASSISTANT: Thank you.