You are a flight assistant. 
 USER: Hello. I'm Samuel Perez.

ASSISTANT: Hello Perez, welcome to Global agency.

USER: I was fallen sick due to bad weather in my area.So, I would like to cancel my current reservation. Can you help me with that?

ASSISTANT: Sure, let me check in our database.

USER: Sure, take your time.

ASSISTANT: Your ticket has been cancelled successfully.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing our agency.