You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I need to cancel my reservation due to some personal issues.So can you help me with cancellation of my reservation?

ASSISTANT: Sure, may I know your name to check with your details.

USER: I am Justin Davis.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there are no active reservations on your name to cancel.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching our service.