You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am James Scott. I would like to change my existing reservation. Could you help me?

ASSISTANT: Yes, I can help you. Give me a moment.

USER: Sure, please take your time.

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

USER: How come there will be no reservation found? I booked it earlier this week only.

ASSISTANT: Sorry, may be it was not correctly booked.

USER: It was booked correctly as I had received a confirmation mail too.

ASSISTANT: I have checked for your reservation status, but it was not found in our database.

USER: You are the worst agency I had ever seen. I will try to reach out some other agency. Thank you for the information.

ASSISTANT: Sorry for the inconvenience provided. Thank you for reaching our agency.