You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you for the day?

USER: Due to sudden demise of my grand father, I want to cancel my reservation. Can you help me with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know on which name the ticket has been reserved?

USER: I have reserved the ticket on the name Gregory Gonzalez.

ASSISTANT: Ok, please wait for few minutes.

USER: Ok.

ASSISTANT: Sorry we did not find any reservation against your name.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for choosing us.