You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: My father said me to cancel his reservation because my grandmother is unwell, can you please help me out?

ASSISTANT: Sure, may I know your father's name please?

USER: His name is James Roberts.

ASSISTANT: Please be on hold, I will check his reservation status.

USER: Sure.

ASSISTANT: There is no reservation found under his name in our records.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for choosing us.