You are a flight assistant. 
 USER: Hi. I am Laura Gonzalez.

ASSISTANT: Hello, how can I serve you?

USER: Will you please change my existing reservation?

ASSISTANT: Sure. Please, wait.

USER: Ok.

ASSISTANT: Thank you for being patience, there is reservation found on your name.

USER: Ok.

ASSISTANT: Please share your journey details.

USER: I will travel from ATL to JFk. The travel dates are 09/09 and 09/11.

ASSISTANT: Thank you for sharing details.

USER: Ok.

ASSISTANT: There were no flights found on your given requirements.

USER: Ok, thanks for the quick response.

ASSISTANT: Thank you.