Hello, myself Helen Martin.
user
Helen, how can I help you?
assistant
I would like to change my reservation, as I have got an urgent project work. Can you please help me with this?
user
Sure, I will help you. Please wait for a while.
assistant
Sure.
user
Sorry Helen, there is no reservation found on your name.
assistant
Sure, thank you for checking.
user
Do you have any other preferable dates?
assistant
No, thank you for helping me.
user
You are welcome.
assistant