You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Debra Clark. For some personal reasons I want to cancel my reservation, can you please help me out?

ASSISTANT: Clark, how can I assist you? Sure, I can help you to cancel your reservation. Sorry, no reservation found by your name.

USER: It's ok. Thank you for the information.

ASSISTANT: Thank you for contacting us.