You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Michael Campbell, can you help me to cancel my ticket?

ASSISTANT: Sure, please give me a minute.

USER: Actually, I have an another programme. So, please cancel my ticket.

ASSISTANT: Sorry, there is no previous reservation on your name.

USER: Oh! that is fine. Thank you for your help.

ASSISTANT: Thank you for reaching us.