Hello.
user
Hello, how may I help you?
assistant
I am Larry Allen. I want to do some changes in the existing reservation because my friends are not able to come on the those dates, can you please help me?
user
Sure, wait for a minute. Ok, may I know your new airport codes?
assistant
Sure. My airport codes are OAK to DEN.
user
Ok, can I have your preferable dates?
assistant
My travelling dates are 12/01 to 12/03.
user
Sure, wait for a minute.
assistant
Sure.
user
Sorry, no flight's found on your details.
assistant
That's fine. Thank you for your service.
user
Thank you for contacting us.
assistant