You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Brandon Martin.

ASSISTANT: Yes, Brandon Martin.

USER: As we friends have planned for a trip but the trip has been cancelled due to some bad health conditions. Can you help me in cancellation?

ASSISTANT: Sure, we will help you in cancelling. Give me a moment to check your details.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there is no reservation exist on your name to cancel.

USER: Ok, no problem.

ASSISTANT: Thank you for consulting us.

USER: Thank you for your quick response.