You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Donald Lee.

ASSISTANT: How can I help you today?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you help me in this?

ASSISTANT: Sure, wait a moment.

USER: Ok.

ASSISTANT: Sorry Donald Lee, there is no reservation found with your name.

USER: Not an issue, thank you.

ASSISTANT: Thanks for opting us.