You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you at this moment?

USER: Due to sudden demise of my Great Grandfather, I am requesting you to cancel my reservation. Will you help me in that?

ASSISTANT: Sure, I am here to help you. Can you please help me with your name?

USER: My name is William Brown.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Thanks for your presence, there is no flight found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us.