You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My father want's to meet his old friend who is staying in Angeles.So I need to book a flight ticket.

ASSISTANT: Ok.

USER: My father travelling details are from CA-LAX on 05/21 and return to CA-LAX on 05/23. It's a round trip.

ASSISTANT: Thanks for the giving me the details. I am checking, please wait.

USER: Ok.

ASSISTANT: I am glad to tell you that, there is a flight available, Delta airlines, flight number 1020. Price is 100 and one connection.

USER: Ok, you can proceed for booking.

ASSISTANT: And may I know your name please?

USER: My father name is Patrica Robinson.

ASSISTANT: Yes, your ticket is confirmed now.

USER: Thank you.

ASSISTANT: Thanks for choosing our airlines.