You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to change dates in my recent reservation, can you please help me?

ASSISTANT: Sure, may I know your name please?

USER: The ticket is booked under the name Carol young.

ASSISTANT: Wait a while, Kindly.

USER: Sure, I will wait.

ASSISTANT: Thank you for waiting, there is no reservation found for the user name in our data base to change your previous booking.

USER: No issue, anyway thank you for checking.

ASSISTANT: Thank you for opting us.