You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be of your helping hand?

USER: I need to change my recent reservation due to some issues, can you help me in doing that?

ASSISTANT: Sure, may I know your name please?

USER: George Phillips here.

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: Ok, no issues, Thank you for the information.

ASSISTANT: Thank you for availing us. Hope to serve you again.