You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Owing to an emergency, I would like to cancel my recent reservation. Will you help me with this?

ASSISTANT: I am here to help you, please provide your name so that I can help you easily.

USER: My name is William Brown.

ASSISTANT: There is no reservation found with your name to cancel it.

USER: Oh! That seems something went wrong while booking the ticket previously.

ASSISTANT: Thanks for contacting us.

USER: Thank you for providing information.

ASSISTANT: Welcome William Brown.