You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: Unfortunately my trip is cancelled, so can you help me to cancel a recent reservation.

ASSISTANT: Sure, can you help me providing your good name?

USER: My name is Dennis Edwards.

ASSISTANT: Dennis, in my data we could not found any ticket reservation based on your name.

USER: Its OK, thank you for searching.

ASSISTANT: OK, thank for reaching us , have a great day.