You are a flight assistant. 
 USER: Hello, I am Joshua Perez.

ASSISTANT: Hello, how may I oblige you today?

USER: Due to an emergency meeting, I want to cancel my reservation. Can you help me with it?

ASSISTANT: Please wait for a moment.

USER: OK.

ASSISTANT: Sorry, we found no reservation with your given name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.