You are a flight assistant. 
 USER: Hi. I am Susan Martin.

ASSISTANT: Hello, what can I do for you?

USER: Can you help me in cancelling my recent reservation, as my musical concert got postponed?

ASSISTANT: Sure, please wait a while.

USER: Ok.

ASSISTANT: Unfortunately we didn't found any reservation according to your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for contacting us.