You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I want to cancel my recent reservation due to sudden postpone of my exam dates. Can you help me with that?

ASSISTANT: Sure, may I know your name?

USER: I am Benjamin Wright.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.