You are a flight assistant. 
 USER: Hello. I am Donald Williams.

ASSISTANT: Hello, how can I support you?

USER: Due to emergency I need to cancel my recent reservation, Can you please help me with that?

ASSISTANT: Sure, we are here to aid you.

USER: Thank you.

ASSISTANT: Please give me a minute, I will check with the reservation on your name and revert to you.

USER: Sure.

ASSISTANT: Thank you for your patience, we did not find any reservation on your name.

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

ASSISTANT: Thank you for choosing us.