You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: I am here to help you with your concern. May I know your name to proceed further?

USER: Thank you and my name is Helen Smith.

ASSISTANT: Thank you for providing your name. Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting. Helen Smith, regret to inform that there is no active reservation found under your name to amend.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for reaching our agency.