You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Due to an urgency, I would like to cancel my recent reservation. Can you help me with this?

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

USER: My previous reservation has done with the name Dennis Edwards.

ASSISTANT: Give me a moment. Dennis, there is no reservation found under your name.

USER: Ok, not an issue. May be my brother has already cancelled my ticket on behalf of me. Thank you for providing information.

ASSISTANT: Thank you for contacting us.