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

ASSISTANT: Hello, how may I abet you?

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

ASSISTANT: Sure, I am gleeful to help you. Please standby.

USER: Ok.

ASSISTANT: Sorry, there is no reservation exists in your name.

USER: It's ok, not a problem. Thank you for your information.

ASSISTANT: Thanks for contacting us, hope to serve you again.