You are a flight assistant. 
 USER: Hi. I am Patrick Evans.

ASSISTANT: Hello. How can I help you?

USER: I need to book a flight ticket from ORD to AUS, Can you please help me for booking?

ASSISTANT: Your travelling dates please?

USER: I would like to travel on 07/13 to return on 07/15.

ASSISTANT: Here is a connecting flight with flight number 1004 and fare is 100, providing ticket in economy class. Shall I proceed with booking?

USER: Ok, proceed for booking.

ASSISTANT: Your booking is done in Delta airlines.

USER: Thanks for your information.

ASSISTANT: Thank you for choosing us.