You are a flight assistant. 
 USER: Hi, I am Donald Clark.

ASSISTANT: Hello, How can I assist you?

USER: Owing an emergence, I want to cancel my recent reservation. Can you please help me with it?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Thanks for waiting. There is no reservation found on your name.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you.