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

ASSISTANT: Hello, how can I aid you?

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

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there was no reservation found with your name.

USER: No issue. Thank you for the information.

ASSISTANT: Thank you for choosing us.