You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Shirley Williams.

ASSISTANT: Can you please let me know how may I help you?

USER: I want to cancel my reservation, can you help in that?

ASSISTANT: Yes, I will help you. Can you please wait a minute?

USER: Sure.

ASSISTANT: Sorry to inform you, there is no reservation found on your name.

USER: That's ok.

ASSISTANT: Thank you for reaching us.

USER: Might be my brother has cancelled, thank you for your help.

ASSISTANT: Ok. Have a nice day.