You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: I am Kathleen Roberts planning to have a round trip from PHL, can you help me to book a flight ticket?

ASSISTANT: Sure, could you please share your location airport codes? Thanks for providing your codes, may I know  your trip dates?

USER: I want to take off on 05/02 and please confirm my return ticket also on 05/04.

ASSISTANT: The UA airline with flight number 1005 is available, is it ok for you?

USER: Ok, proceed with my booking.

ASSISTANT: Ok, your ticket is booked.

USER: Thank you.

ASSISTANT: You are welcome.