You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Mary Taylor.

ASSISTANT: How may I aid you? Nice to meet you Mary.

USER: Could you please help me to cancel my recent reservation as my plan to meet my grand parents got postpone?

ASSISTANT: Sure, please wait for a moment.

USER: Thank you. Ok.

ASSISTANT: I have searched online but I could not find your flight reservation to cancel it.

USER: Ok, not an issue.

ASSISTANT: Thank you.

USER: Thank you for your information.