You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Charles Mitchell on this end.

ASSISTANT: How can I help you Charles?

USER: I would like to cancel my trip ticket, which I have booked for my holiday in next week. Can you help me?

ASSISTANT: Please wait for a moment.

USER: Ok, sure.

ASSISTANT: I did not find any reservation under your name.

USER: Oh! That's sad, thank you for checking.

ASSISTANT: Most welcome, have a good day.