You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please cancel my recent reservation?

ASSISTANT: Sure, will you mention the name for checking the reservation?

USER: I have reserved my flight ticket in the name David Williams.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Thank you for waiting. There is no reservation found under your name.

USER: Ok, fine not an issue. Thank you for assisting me.

ASSISTANT: Welcome, have a great day.