You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Can you help me to book a flight from Austin to reach Chicago for vacation?

ASSISTANT: Can I know your travelling dates?

USER: I will travel on July 24 and return on July 26.

ASSISTANT: Please let me know your connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Do you have any other preference?

USER: No.

ASSISTANT: American Airline is providing ticket in business class and 500 as ticket fare. Shall I proceed with booking?

USER: Please proceed with booking.

ASSISTANT: May I know your name?

USER: My name is Mathew Baker.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us.