You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: Andrew Wright here.

ASSISTANT: Welcome to flight booking agency Andrew Wright.

USER: I just want to change my existing reservation, due to sudden demise of my grand mother.

ASSISTANT: Sure, I will hep you with that.

USER: Thank you.

ASSISTANT: Please wait a moment to check your previous reservation.

USER: Ok.

ASSISTANT: We regret to inform you that there is no reservation found on your name in our records.

USER: That's ok, not a problem. Thank you for informing.

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