You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: My name is Anna Phillips. Owing an emergency, I want to cancel my reservation.

ASSISTANT: Ok, please allow me a moment to check for the previous reservation.

USER: That's ok, thank you for checking.

ASSISTANT: Anna, there is no reservation found under your name.

USER: Thank you for checking.

ASSISTANT: You are welcome. Thank you for contacting us.

USER: Welcome.