You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: Could you help me to amend my existing reservation?

ASSISTANT: Sure, I am here to help you with that, can I know your good name to proceed further?

USER: My name is Jennifer Williams.

ASSISTANT:  I found your reservation on your name please share your travel dates.

USER: My travel dates are Feb 12 and Feb 14.

ASSISTANT: May I know your airport codes?

USER: I am heading to LAS from DTW.

ASSISTANT: Do you prefer any lay by in between journey?

USER: Yes, I prefer a lay by.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: I don't have any other specifications.

ASSISTANT: May I know your name please?

USER: I already mentioned above.

ASSISTANT: No flights found as per your preferences at the moment.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for choosing us.