You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: My friend has met with an accident and I need to take care of him. I would like to cancel my trip. Can you please cancel my reservation?

ASSISTANT: Sure, I will help you with that. Can I have your name please to check your reservation status?

USER: My name is Barbara Williams.

ASSISTANT: Please wait a moment to check your reservation status. Sorry Barbara Williams, no reservation has found under your name to cancel.

USER: Sure, take your time. Its ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.