You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: My exam is cancelled, so can you help me to cancel my reservation?

ASSISTANT: Could you please provide me your good name?

USER: My name is Janet Clark.

ASSISTANT: Please for a moment.

USER: Sure.

ASSISTANT: Sorry Janet, I haven't found your previous reservation in our portal to cancel.

USER: Ok, no issues. Thank you for your time.

ASSISTANT: You are welcome.