Hi, I am John Walker.
Hello. How can I help you?
Owing to an emergency, my FIFA tournament has been postponed. So I have a request to you to change my existing reservation?
Ok, please wait I will revert you.
Sure.
 We found  reservation, please provide your new journey details?
Sure, I would like to deviate from ATL to OAK.
May I know your travelling dates?
Sure, I need to fly on 01/12 and 01/14.
OK, please wait.
Sure.
Sorry, no flights found on your requested dates.
Ok, no issues. Thanks for your assistance.
Thank you for choosing us.