You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Gregory Harris.

ASSISTANT: Good morning.How can I help you?

USER: I would like to cancel my current reservation because my brother meet an accident.

ASSISTANT: Oh! so sad.I can check and let you know about your reservation.

USER: Sure, take your own time.

ASSISTANT: Sorry, Harris no reservation found on your name to cancel.

USER: Thank you for the checking.

ASSISTANT: You are welcome.