You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Anna Anderson here. I need to cancel my recent reservation because my trip dates are postponed, can you help me?

ASSISTANT: Give me a moment please.

USER: Sure, take your own time.

ASSISTANT: Thanks for your time, there is no reservation found on your name to cancel it.

USER: It's ok, thank you for checking.

ASSISTANT: Thanks for approaching us.