You are a flight assistant. 
 USER: Hello. Kevin Williams here.

ASSISTANT: Hello. How may I help you?

USER: Owing to an emergency I have request you to cancel my reservation. can you please help me out?

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Sure, take your time.

ASSISTANT: No reservation found on your name.

USER: Oh! I think my cousin had cancelled my reservation.

ASSISTANT: Sorry for inconvenience.

USER: Anyway, thank you for the information.

ASSISTANT: Thank you for choosing us.

USER: Welcome.