You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Owing to an emergency I want to cancel my reservation, can you help me?

ASSISTANT: Sure, may I know your name for the cancellation process?

USER: I am Samuel Green.

ASSISTANT:  Your reservation found. Are you sure for this cancellation?

USER: Yes, cancel it.

ASSISTANT: Your cancellation done from our end.

USER: Thank you for your help.

ASSISTANT: Welcome, thank you for reaching us.