You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I provide service to you?

USER: Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know on which name the ticket has been reserved.

USER: Please check with the name of Jessica Miller.

ASSISTANT: Please wait for a while, I will check with your reservation status and revert to you.

USER: Sure.

ASSISTANT: We found a reservation with your name. please provide your journey details.

USER: Ok. I need to leave from my nearest airport OAK to reach MCO.

ASSISTANT: Ok.

USER:  I want to travel on 06/03, and need to catch return flight on 06/05.

ASSISTANT: Do you prefer any halt in between journey?

USER: No, I prefer a direct flight.

ASSISTANT: Ok, please wait for  a while.

USER: Sure.

ASSISTANT: Thank you for waiting, we did not find any flights matching your journey dates.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for choosing us.