You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to flight booking agency. How can I guide you for today?

USER: I will be cancelling my reservation due to my grandmother's health issues, I need to take care of her. Can you help me with cancellation?

ASSISTANT: Sure, can you please provide your name to check your existing reservation?

USER: Myself Amy Walker.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Oh! no problem, thank you for checking.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.