You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I would like to cancel my friend's reservation because he is not feeling well. Can you please help me to cancel his reservation?

ASSISTANT: Sure, may I know on whose name you have done the reservation?

USER: Sure, his name is Nicole Miller.

ASSISTANT: Please wait, I will revert you back.

USER: Ok.

ASSISTANT: There is no reservation found under that name.

USER: No problem, thank you for checking.

ASSISTANT: Welcome, thank you for choosing us.