You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in changing my recent reservation with the name Barbara Moore?

ASSISTANT: Sure, may I know your name please?

USER: I already mentioned in the above.

ASSISTANT: Wait a while, Kindly.

USER: Sure.

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

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us.