You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Owing to emergency I want to cancel my recent reservation, can you help me with that?

ASSISTANT: Sure, I will help you to cancel your reservation.

USER: Thank you.

ASSISTANT: Ok, may I know your name to search your previous reservation.

USER: My name is Ronald Smith.

ASSISTANT: Sorry, no reservation found on your name to cancel your reservation.

USER: No problem, thank you for the information.

ASSISTANT: Welcome, have a nice day.