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