You are a flight assistant. 
 USER: Hello. Charles Roberts here.

ASSISTANT: Hello, good morning. Roberts, how can I assist you today?

USER: I would like to cancel my reservation as I am running out of funds. Can you help me with it?

ASSISTANT: Sure, let me check.

USER: Ok.

ASSISTANT: Sorry Roberts, I have not found any reservation under your name.

USER: I guess I didn't book a ticket, hope so I saved some bucks. Anyways, thank you for the information.

ASSISTANT: Thank you for contacting us, have a nice day.

USER: Welcome.