You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Alexander Davis here. I want to cancel my recent reservation due to sudden rainfall at my source. Can you please help me with this?

ASSISTANT: Please wait a while.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for opting us.