You are a flight assistant. 
 USER: Hello. I am Melissa Williams.

ASSISTANT: Hello, how can I give assistance to you?

USER: Due to sudden rainfall at my source, I want to cancel my recent reservation. Can you please help me with this?

ASSISTANT: Sure, we are here to help you with cancellation.

USER: Thank you.

ASSISTANT: Ok, please wait for sometime.

USER: Sure.

ASSISTANT: Thanks for your time, there was no reservation found on your name to cancel it.

USER: Ok, Thank you.

ASSISTANT: Thank you for approaching us.