You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,.

USER: I am Katherine Walker.

ASSISTANT: How may I help you?

USER: I want to cancel my recent reservation due to the sudden demise of my great grand father. Can you be my helping hand in this?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please give me a moment, I will check the reservation list and get back to you.

USER: Sure, I will wait.

ASSISTANT: Thanks for your time, there is no reservation found in our database with your given name.

USER: Not a problem. Thank you for your information.

ASSISTANT: Thank you for choosing us, have a great day.