You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I best assist you now?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: Sure, may I know your name please?

USER: Myself Elizabeth Gonzalez.

ASSISTANT: Wait a while, kindly.

USER: Ok, 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: Ok, thanks for your information.

ASSISTANT: Thank you for reaching us.