You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I have done my flight ticket reservation last week.

ASSISTANT: Ok, may I know your name?

USER: But due to some reasons I would like to cancel the reservation. I'm Eric Green.Can you please cancel it?

ASSISTANT: Sorry, Eric no reservation found on your name.

USER: Ok, thank you for the quick response.

ASSISTANT: Thank you for contacting us.