You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My brother want to celebrate his birthday party in Dallas at his grandfather's place, can you please help me to book his ticket?

ASSISTANT: Sure, what dates would you like me to book this ticket for?

USER: Sure, he want to depart on 10/21 and return on 10/23.

ASSISTANT: Noted, kindly can you share the codes of airport on which route your brother want to travel?

USER: Ok, he want to travel from JFK to DFW.

ASSISTANT: Ok, there is a flight 1013 in AA airline matching your requirements with price 100. Shall I proceed?

USER: Sure, you can proceed for booking his ticket.

ASSISTANT: May I know your brother's name to proceed for booking process?

USER: Yes, his name is Thomas Lopez.

ASSISTANT: Ok, booking is confirmed on the name of Thomas Lopez.

USER: Thank you, he will be very happy.

ASSISTANT: You are welcome. Have a nice day.