You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: My name is Helen Campbell. I want to cancel my recent reservation due to heavy rainfall. Can you help me in cancellation?

ASSISTANT: Sure, we are gladly here at your service. Please wait for a while, let me check your existing reservation and revert to you.

USER: Sure.

ASSISTANT: Thanks for your valuable time, sorry, unfortunately no reservation found with your name in our database.

USER: Ok, No problem. Thank you.

ASSISTANT: Thank you for connecting with us. have a great day ahead.