You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Donald Hernandez.

ASSISTANT: How may I render you today?

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

ASSISTANT: Sure, I am here to help you. Please wait for a moment.

USER: Ok.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for visiting us.