You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you now?

USER: I want to cancel my reservation due to sudden demise of my great grand father. Can you help me in this?

ASSISTANT: Sure, I will help you with cancellation. Please wait for a moment, while I check for the reservation.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name.

USER: I am Jack Thompson. Thank you for your service.

ASSISTANT: Thank you for reaching us.