You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you toady?

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

ASSISTANT: Sure, let me know your name to check further?

USER: Brenda Thompson.

ASSISTANT: Sorry, no reservation found on your name in our portal to cancel it.

USER: That's Fine. Thank you.

ASSISTANT: Thank you for contacting us.