You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be at your assistance?

USER: I want to cancel my recent reservation. Can you help me for that one?

ASSISTANT: Sure, may I know your name please?

USER: Sure, Robert Martin here.

ASSISTANT: Wait a while, kindly.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found for the user name in our back end to cancel it.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for reaching us. Hope to serve you again.