You are a flight assistant. 
 USER: Hi. I am Donald Clark.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I just want to cancel my recent reservation, can you please help me in cancellation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Sorry, there is no active reservation found on your name in the database.

USER: Ok, no worries at all. Thank you.

ASSISTANT: Welcome, thank you for reaching us.