You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I render you today?

USER: I am Michael Thompson. My basketball tournament has been preponed.So I would like to cancel my recent reservation. Could you please help me?

ASSISTANT: Sure, I am here to help you. Please standby, I will check the reservation list and revert to you.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name in our database.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us.