You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I am Mark Martin want to cancel my reservation, can you help me with it please?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, there was no reservation found on your name.

USER: Thant's ok, thank you for the response.

ASSISTANT: Thank you for choosing us.