You are a flight assistant. 
 USER: Hello. I am Deborah Collins.

ASSISTANT: Hello Collins. How may I help you?

USER: Due to sudden change in my plan, I want to cancel my recent reservation. Can you please help me out?

ASSISTANT: Sure Collins. Please wait a moment. There is no reservation found with your details.

USER: That's ok. Thank you for your time.

ASSISTANT: Is there anything else I can help you?

USER: No, thank you.

ASSISTANT: Thank you.