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

ASSISTANT: Hello. How can I help you?

USER: Owing to an emergency I have request you to cancel my reservation. Can you please help me out with cancelling of my reservation?

ASSISTANT: Ok, just a moment please.

USER: Sure, take your time.

ASSISTANT: I am sorry no reservation found on your name please.

USER: Oh! I think the ticket was not booked properly while I am booking. Anyway, thank you for the information.

ASSISTANT: Thank you for choosing us.

USER: Most welcome.