You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: I want to change my existing reservation due to sudden demise of my grandmother. Can you please help me with this?

ASSISTANT: Sure, may I know your name?

USER: I am Jacob Robinson.

ASSISTANT: Please wait a second.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for opting us.