You are a flight assistant. 
 USER: Hi, I am John Gonzalez.

ASSISTANT: Hello, How can I help you?

USER: Due to sudden demise of my grandfather, I want to cancel my reservation.

ASSISTANT: Ok.

USER: And I need to travel to Los Angeles, can you please change it?

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found with your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for choosing us.