You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I want to change my existing reservation due to some technical issues. Can you help me in doing that?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know the name on which your reservation was made?

USER: Sure, I am Stephen Edwards.

ASSISTANT: Please wait for a moment, while I check for the reservation on your name.

USER: Sure.

ASSISTANT: Thank you for waiting, I found your reservation, please share me details to change your reservation.

USER: Ok.

ASSISTANT: May I know your source and destination airport codes?

USER: My source and destination codes are LGA and MCO.

ASSISTANT: Please mention your new planned journey dates?

USER: Mu planned dates are June 03 and June 05.

ASSISTANT: Do you have any other requirement related to booking?

USER: I need a direct flight.

ASSISTANT: Ok, please wait for a moment while I check for the flight availability.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no flight available on your given journey data.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for visiting us.