You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Stephen Mitchell.

ASSISTANT: How can I serve you at this moment?

USER: Due to heavy tornadoes at my visiting place, I would like to cancel my trip. Can you please help me by cancelling my recent reservation?

ASSISTANT: I am gleeful to help you with that cancelling.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait for your response.

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

USER: Ok, not an issue. May be something went wrong while booking the ticket previously. Thank you for providing information.

ASSISTANT: Thank you for contacting us.