You are a flight assistant. 
 USER: Hello. Myself Donald Martin.

ASSISTANT: Hello, how can I help you?

USER: For some issues I want to cancel my reservation, can you please help me with it?

ASSISTANT: I will cancel the flight ticket which you had reserved previously. Please wait a moment.

USER: Ok.

ASSISTANT: There is no reservation been found in our reservation records.

USER: It's ok. Thank you for the information.

ASSISTANT: Thank you for choosing our service.