You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am William Anderson. I would like to attend prayers in The Catholic Shrine of the Immaculate Conception at Atlanta, ATL. Can you help me in my booking?

ASSISTANT: Sure, may I know your source airport code?

USER: My source airport code is Las Vegas, NV - LAS.

ASSISTANT: What are your planned journey dates?

USER: My journey dates are from 02/15 to 02/17.

ASSISTANT: Please wait a minute.

USER: Sure, take your time.

ASSISTANT: There is a flight in AA airline with a halt and the price is 100. Shall I book?

USER: Proceed with my booking.

ASSISTANT: your ticket is reserved with flight number 1020.

USER: Thank you for your help.

ASSISTANT: Thank you. for choosing us.