Hi. I am Mary Anderson.
user
Hello, how can I amend you?
assistant
 I want to cancel my recent ticket booking due to office work that my manager did not approved my leaves, so can you please cancel it?
user
Sure. Please wait for a while, I will check your reservation.
assistant
Sure, I will wait.
user
Thank you for waiting, there is no reservation found on your name.
assistant
No problem, thank you for the information.
user
Thank you for approaching us.
assistant