You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My trip was postponed due to some issues, so please help me to change an existing reservation.

ASSISTANT: Sure, may I know your name?

USER: My name is Helen Thomas.

ASSISTANT: Please provide me your airport codes and dates of travelling?

USER: The airport codes are from MCO on 08/17, the destination is EWR and the return was on 08/19.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: As per your request, there is flight found for you. Shall I book a flight?

USER: Ok, what is the connection limit?

ASSISTANT: The connection limit is 1.

USER: Ok, please book the ticket.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for helping me.

ASSISTANT: You are welcome.