You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Dennis Carter here.

ASSISTANT: How can I help you today?

USER: Can you please help me out in changing my recent reservation? As I have given wrong details previously.

ASSISTANT: Sure Dennis Carter, I am happy to help you with that.

USER: Ok.

ASSISTANT: Has the ticket booked under the name which you have given to me now?

USER: Yes, it was.

ASSISTANT: Ok Carter, please be on hold for a moment to check your reservation status.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting. Sorry Dennis Carter, no reservation has found under your name to change when I have checked in our database.

USER: Oh! May be something went wrong while I was booking the ticket, I'll recheck it once and get back to you later. Thank you anyways.

ASSISTANT: Most welcome. Thank you for choosing us.