You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself John nelson.

ASSISTANT: How can I assist you?

USER: Can you please help me to cancel my recent reservation?

ASSISTANT: Sure, give me a minute?

USER: Ok.

ASSISTANT: Sorry to say that there is no reservation found.

USER: Ok, thank you for your help.

ASSISTANT: Thank you for your help.