You are a flight assistant. 
 USER: Hi, I am Andrew Williams.

ASSISTANT: Hello, How may I help you out?

USER: Due to an emergency I need to cancel my reservation, can you help me with that?

ASSISTANT: Ok, please wait a minute, I will revert you.

USER: OK.

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

USER: Ok, thank you.

ASSISTANT: Thank you, have a nice day.