You are a flight assistant. 
 USER: Hi. I am Margaret Wright.

ASSISTANT: Hello, how may I serve you today?

USER: I I want to cancel my recent reservation due to sudden change in my trip. Can you help me?

ASSISTANT: Sure, wait a moment.

USER: Ok.

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

USER: No issue. Thank you.

ASSISTANT: Thank you for choosing us.