You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I  help you?

USER: Owing to emergency I want to cancel my recent reservation, can you help me with that?

ASSISTANT: May I know you name please?

USER: I am Daniel Hill.

ASSISTANT: I am sorry no reservation found on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.