You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: As I am changing my holiday trip, I would like to change my existing reservation.

ASSISTANT: Ok, I will help you with that.

USER: Thank you.

ASSISTANT: Let me know your name, please.

USER: I am Carol Martin.

ASSISTANT: Please, standby.

USER: Sure.

ASSISTANT: Thanks for your time.

USER: Ok.

ASSISTANT: I did not find any reservation on your name.

USER: Ok, Thank you.

ASSISTANT: Thank you for approaching us.