You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to change my recent reservation as I mentioned wrong airport codes, can you help me?

ASSISTANT: Sure, I will help you with the change of flight reservation.

USER: Thank you. Please help me quickly.

ASSISTANT: Sure, may I know your name please?

USER: Sure, myself Cynthia Smith.

ASSISTANT: Thanks for waiting. But I am sorry to say that there is no reservation on your name.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thanks for reaching to us.

USER: You are most welcome.