You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I have to cancel my flight ticket booking, can you please help me in that one?

ASSISTANT: What service do you need from our travel agency?

USER: I need a help in that cancelling.

ASSISTANT: Sure, I will help you with that. Can I have your name please?

USER: Ok, my name is Jennifer Lopez.

ASSISTANT: Ok, please hold on for a minute.

USER: Sure, I will wait for your response.

ASSISTANT: I am really happy to tell you, I have found your reservation and successfully cancelled your ticket.

USER: Thank you for cancelling my ticket and quick response.

ASSISTANT: You are welcome. Thank you for reaching us.