You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to cancel my recent reservation due to heavy rainfall, can you please help me with that?

ASSISTANT: May I know your name please?

USER: My name is Charles Martin.

ASSISTANT: Charles Martin sorry, no reservation found at the moment in our database.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.