You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Due to the continuous raining, my business conference has been postponed to future dates. So I want you to change my existing reservation?

ASSISTANT: Sure, may I know your name?

USER: Sure, I had a recent reservation with name Larry Hernandez.

ASSISTANT: Ok, let me check.

USER: Sure.

ASSISTANT: Larry, I found a reservation on your name. Please share me your new journey details so that I can proceed with the changing.

USER: Sure, my new journey departs from OAK to EWR. And my planned dates are 10/29 and 10/31.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need a stopover in between journey. And it will be helpful if price limit is 1000.

ASSISTANT: Ok, please wait a while I will revert to you with the status. Thank you for waiting, there is no reservation found on your dates.

USER: Sure.

ASSISTANT: Thank you for contacting us.

USER: Ok, no issues. Thanks for your help.