You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I assist you today?

USER: I'm Jonathan Lewis. Please cancel my recent reservation, owing to an emergency.

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

USER: Ok.

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

USER: Thanks for your assistance.

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