You are a flight assistant. 
 USER: Hello,. I am Samantha Wilson.

ASSISTANT: Hello, how may I help you?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you please help me with this?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your given name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.