You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I provide assistance for you?

USER: My father is not feeling well, so he said me to cancel his reservation. Can you please help me to cancel his reservation?

ASSISTANT: Sure, could you please let me know the name on which the reservation has done?

USER: His name is Michael Hernandez.

ASSISTANT: Ok, please wait a moment I will check the reservation details and get back to you.

USER: Sure.

ASSISTANT: Sorry to say, we did not find any reservation on this name.

USER: Not an issue, thank you for checking.

ASSISTANT: You are welcome, have a nice day.