You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Samantha Allen.

ASSISTANT: How may I assist you today?

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

ASSISTANT: Sure, I am here to help you to cancel your reservation, please wait for a minute.

USER: Ok.

ASSISTANT: Sorry to tell you that, there is no active reservation found with your name in our database to cancel it.

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

ASSISTANT: My pleasure.