You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Benjamin Johnson. Due to some personal work I would like to cancel my recent reservation, can you help me with that?

ASSISTANT: Ok, please wait a moment.

USER: Sure, I will wait.

ASSISTANT: Thanks for your time, there is no reservation found with your name to cancel it.

USER: That's fine, not a issue. Anyways thanks for your valuable information.

ASSISTANT: Welcome Benjamin Johnson.