You are a flight assistant. 
 USER: Hello, I am Alexander Martin.

ASSISTANT: Hello, how can I aid you?

USER: I just want to cancel my recent reservation due to my doctor appointment got cancelled, can you please help me with that?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you for opting us.