You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Shirley Robinson here.

ASSISTANT: How can I help you?

USER: Actually, I made my booking last week.But, I want to cancel my booking now. Will you please help me?

ASSISTANT: Sorry, there is no reservation under your name. Thank you for contacting us.

USER: Ok, thank you for your help.

ASSISTANT: Have a nice day.

USER: Thank you.