You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Due to typical climatic condition in Dallas, I would like to cancel my trip. Can you please cancel my recent reservation?

ASSISTANT: Sure, may I know your name to check for the previous reservation?

USER: My previous reservation has done with the name David Thompson.

ASSISTANT: David, there is no reservation found under your name.

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

ASSISTANT: Thank you for contacting us.