You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Due to change in my plans to visit Dallas, I would like to change my existing reservation. Can you help me with this?

ASSISTANT: Sure, I will help you with this, please hold on for a moment to check your status.

USER: Sure.

ASSISTANT: May I know your name please?

USER: My previous reservation has done with my name Ashley Wilson.

ASSISTANT: Wilson, I did not find any reservation with your name in my database.

USER: Ok, not an issue. May be something went wrong while booking the ticket.

ASSISTANT: Thank you for reaching us.

USER: Thank you for providing information.

ASSISTANT: You are welcome.