You are a flight assistant. 
 USER: Hello, its Stephanie Evans this side.

ASSISTANT: Hello Stephanie, how can I assist you?

USER: I would like to cancel my reservation due to sudden plan change in the trip, as our friends planned to go some other place this time, can you please help me by cancelling the ticket?

ASSISTANT: Sure. Sorry, no reservation found by your name.

USER: That's fine, thank you for your response.

ASSISTANT: Thank you for contacting us.