You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I want to cancel my flight reservation as I am sick, please help me out.

ASSISTANT: sure, let me know your name to check your reservation details.

USER: Sure, myself Frank Walker.

ASSISTANT: Thank you. Please wait for a while, let me check your reservation status.

USER: Sure.

ASSISTANT:  I am very sorry to inform you that there is no reservation found under your name in our database.

USER: Oh! Not an issue. Anyway, thank you for checking.

ASSISTANT: Thank you for choosing us.