You are a flight assistant. 
 USER: Hi. I am Samantha Allen.

ASSISTANT: Hello, how may I serve you today?

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

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name to cancel.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.