You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Mary Lewis here.

ASSISTANT: How can I assist you?

USER: Due to inconvenience of my work, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Sure Lewis, please give me a minute.

USER: Ok, I will wait.

ASSISTANT: Lewis, I found your reservation and cancelled it successfully.

USER: Anyway, thanks for the help.

ASSISTANT: Thank you for choosing us.