You are a flight assistant. 
 USER: Hello, I am Mark Perez.

ASSISTANT: Hello, how may I assist you?

USER: As the baby shower function of my sister got postponed, I want to to cancel my earlier reservation. Can you please help me?

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation found with your name to cancel the reservation.

USER: It's ok. Thanks for the information.

ASSISTANT: Thank you for approaching us, have a good day.