You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Is this Travel leaders agency?

ASSISTANT: Yes, it is Travel leaders agency. How can I help you today?

USER: Last week, I had booked a ticket to New York through your agency, but by mistake I specified wrong airport code, so I want to change my existing reservation.

ASSISTANT: Sure, I'll help you with this. Please provide your name to change the reservation.

USER: The ticket is booked on the name Samantha Garcia.

ASSISTANT: Wait a while, let me check whether your name is enrolled in our database or not.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found with your name to change the existing reservation.

USER: It's ok, I will check for other alternative.

ASSISTANT: Thank you, have a great day.

USER: I think so, I have specified wrong name. Anyway, thanks for your help.

ASSISTANT: Welcome.