You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I am Carolyn Martinez. I want to change an existing reservation, due to my family tour trip got postponed.

ASSISTANT: Ok, I will help you with that. Please wait for moment while I check for the reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for reaching us, we hope see you again.