You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Myself Joseph Walker.

ASSISTANT: Yes, Joseph.

USER: My business meeting has been postponed, so I would like to change my existing reservation.

ASSISTANT: Sure, let me check with your details. Joseph, I have found your reservation. Please provide me your new journey details.

USER: Ok. My airport codes are LAS and MCO. My trip dates are 04/30 to 05/02.

ASSISTANT: Ok, please give me a moment, Joseph.

USER: Sure.

ASSISTANT: Good news for you, I have found an available ticket for you from Hawaiian airline which cost you only 700. Are you ok with this?

USER: Yes.

ASSISTANT: Your ticket has been booked with flight number 1012.

USER: Ok. Thank you for your help.

ASSISTANT: It's our pleasure. Thank you for contacting us, have a safe journey.