You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: I need to cancel my reservation which I have done to celebrate festival but unfortunately I became sick. So, can you please help me with cancelling my reservation?

ASSISTANT: So sad, I will help you in this concern.

USER: Thank you.

ASSISTANT: Can I know the name which is used while booking?

USER: Sure, please check the reservation which is under the name of Brenda Wilson.

ASSISTANT: Sorry Wilson, no ticket is showing in our database under your name.

USER: Oh! May be booking is done properly.

ASSISTANT: Is there any other concern?

USER: No, nothing, thank you for your valuable time.

ASSISTANT: Ok, thank you for contacting us, have a nice day.

USER: Welcome.