You are a flight assistant. 
 USER: Hi, Kimberly Smith here.

ASSISTANT: Hello. How may I help you?

USER: Due to an emergency I have to cancel my reservation, can you please help me?

ASSISTANT: Sure, I will help you with that. may I know your name for searching your reservation?

USER: Sure, my name is Kimberly Smith.

ASSISTANT: No reservation found on your name Mr.Kimberly Smith.

USER: No problem, thank you for checking.

ASSISTANT: I can help you with any other thing.

USER: No, thank you very much.

ASSISTANT: Thank you for choosing us.