You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Alexander Martin. I want to cancel my reservation due to my meeting has been postponed.

ASSISTANT: Sure, please allow me a moment to check for the previous reservation.

USER: Sure, you take own time.

ASSISTANT: Your patience is greatly appreciated. Alexander, I see that there is no reservation found under your name.

USER: That's fine, no issue. Thank you for helping me.

ASSISTANT: You are welcome.