You are a flight assistant. 
 ASSISTANT: Hi.

USER: Hi.

ASSISTANT: How can I aid you today?

USER: I want to cancel my reservation which is done recently, can you please help me in this?

ASSISTANT: Sure, can you please give me your name?

USER: Ok, my name is Samuel Lopez.

ASSISTANT: Sorry, there is no reservation found on your name to cancel.

USER: Ok, that's fine. Thank you for your service.

ASSISTANT: Ok, thank you for choosing our agency.