You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to our agency. How can I assist you?

USER: My cousin has given a surprise visit to my house due to which I would like to cancel my recent reservation. Can you help me?

ASSISTANT: Yes, I am glad to help you. May I know your name please to check the reservation status?

USER: I had reserved the ticket with the name Helen Roberts.

ASSISTANT: Helen, please give me a minute.

USER: Ok, take your time.

ASSISTANT: I couldn't find your reservation details in our database, Helen.

USER: How could it be possible? I have confirmation mail sent by your agency. I demand an explanation for this.

ASSISTANT: Helen, we did not receive your payment and it is the reason which your ticket got cancelled.

USER: It's ok, no issues.

ASSISTANT: Hope your query got cleared. Is there anything else I could help you?

USER: No, thank you for your information.

ASSISTANT: Thank you for contacting us, have a good day.