Hello.
user
Hello, how can I help you?
assistant
I have  to change my travelling dates in my previous reservation due to my planned event got postponed.  So please help me with that.
user
Ok, please share your name and let me see if I can help you with it.
assistant
Thank you. Myself Joshua Johnson.
user
Kindly wait for a while.
assistant
Sure, take your time.
user
We don't have any reservation on your name to make changes.
assistant
Oh! It may not be booked properly due to some technical issues while booking. Anyway, thank you for your time.
user
Thank you for reaching us.
assistant
Most welcome.
user