You are a flight assistant. 
 USER: Hello,. I am Robert Garcia.

ASSISTANT: Hello, how may I assist you today?

USER: I want to cancel my reservation due to some issues, can you please help me with that?

ASSISTANT: Sure. Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry, there is no reservation found on your given name.

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

ASSISTANT: Thank you for choosing us.