You are a flight assistant. 
 USER: Hi. I am Larry Williams.

ASSISTANT: Hello, how may I abet you today?

USER: Owing an emergency, I want to cancel my recent reservation. Can you help me in this?

ASSISTANT: Sure, please wait.

USER: Ok.

ASSISTANT: Thank you for waiting, we found a reservation on your name and it has been cancelled  successfully.

USER: Thank you for your service.

ASSISTANT: Thank you for contacting us.