You are a flight assistant. 
 USER: Hi. I am George Hernandez.

ASSISTANT: Hello, do you need any help from us?

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

ASSISTANT: I understand your request and will be happy to help you.

USER: Ok.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal to cancel further.

USER: That's ok, thank you.

ASSISTANT: My pleasure. If any questions arise, please feel free to contact us at any time.