You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

USER: My name is Daniel Smith. I want to change my existing reservation, due to sudden demise of my grand mother. Please help me in that.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a moment, I will check the reservation on your name and revert to you.

USER: Sure.

ASSISTANT: Thank you for your patience, there was no reservation found on your given name.

USER: Thanks for your information. No problem.

ASSISTANT: Thank you for approaching us.