Hello. I am Patrick Nelson.
user
Hello, How exactly I can serve you the best today?
assistant
I want to change my existing reservation due to heavy rain fall at my destination. Can you please help me with that?
user
Sure, I will help you with that.
assistant
Thank you.
user
Please wait a while.
assistant
Sure.
user
Thank you for waiting.
assistant
OK.
user
 I have checked in reservation list to change your ticket, but could not find any reservation with your name.
assistant
No problem. Thank you for your information.
user
Thank you for reaching us.
assistant