You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you for the day?

USER: I am Susan Phillips. I want to change an existing reservation, due to my family tour trip got postponed. Could you help me in changing a reservation?

ASSISTANT: Sure, we are glad to help you. Please wait a minute, I will check and let you know the status your reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, no reservation found on your name.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for opting us.