You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Anthony Carter here.

ASSISTANT: How can I help you now?

USER:  I am frustrated with your service because your agent has booked a ticket on wrong date, so I want to cancel my reservation.

ASSISTANT: Ok, please wait for a while.

USER: Ok sure.

ASSISTANT: Sorry Anthony, there is no reservation found on your name.

USER: That's fine, thank you for your help.

ASSISTANT: Thank you for approaching us, have a nice day.