You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Jerry Gonzalez.

ASSISTANT: How can I assist you today?

USER: I am having an issue with my existing reservation and I want change it. Can you help me out with it?

ASSISTANT: Just a moment I will let you know the information.

USER: OK.

ASSISTANT: We are happy to inform you that there is a reservation found on your name. Could you please provide me your details?

USER: Sure. My new reservation departs from Austin, TX -AUS on May 2nd and returns from Boston, MA - BOS on May 4th.

ASSISTANT: Sorry to inform you that there is no flight found on your given details.

USER: OK. No issues. Thanks for your response.

ASSISTANT: Thank you.