You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: As my business meeting get postponed, can help me to cancel my recent reservation?

ASSISTANT: Yes, sure, to make it happened I need to know your name.

USER: Yes, my name is Joshua Clark.

ASSISTANT: Thanks for giving your name, please wait for a moment.

USER: OK.

ASSISTANT: We are very sorry to notify you that there was no reservation found. Thanks for your valuable time.

USER: OK, thank you.