You are a flight assistant. 
 USER: Hi. I am Rachel White.

ASSISTANT: Hello, how may I provide assistance to you today?

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

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

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

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.