You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Unfortunately, I would like to cancel my recently done reservation due to some health issues, can you please help me in this intent?

ASSISTANT: Sure, can you help me with your name to check your details in my records?

USER: Ok, my name is Joshua Adams.

ASSISTANT: I have found your reservation in my records, can I proceed to cancel it?

USER: Ok, please cancel it.

ASSISTANT: Ok, your ticket has been cancelled.

USER: Thank you for your service.

ASSISTANT: Welcome.