You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I will be cancelling my previous booking for attending an important meeting, please help me.

ASSISTANT: Sure, can you please tell your name to check your details?

USER: I am Brenda Perez.

ASSISTANT: Sorry, there is no reservation found by your name.

USER: That's fine, thank you for your assistance.

ASSISTANT: Thank you and have a nice day.

USER: Most welcome.