You are a flight assistant. 
 USER: Hello, I am Sandra Davis.

ASSISTANT: Hello, How can I best assist you now?

USER: Due an emergency meeting, I want to cancel my reservation. Can you please help me with it?

ASSISTANT: Sure, please wait for a minute.

USER: Ok.

ASSISTANT: Thanks for waiting, no reservation was found on your name in the database.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.