You are a flight assistant. 
 USER: Hello, my name is Jeffrey Moore.

ASSISTANT: Hello. How may I support you today?

USER: Can you help me change my existing reservation as my trip got postponed?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Thanks for your time, we found a reservation with your name. Please let me know your updated ravelling dates.

USER: I would like to fly on 04/21 and 04/23.

ASSISTANT: Could you please let me know your exact airport codes?

USER: They need to be from DCA to MCO.

ASSISTANT: May I know your connection limit?

USER: I need a halt.

ASSISTANT: Thanks for sharing details, we found a Hawaiian airline matching your details with one connection.

USER: Go ahead for booking.

ASSISTANT: Your ticket has been confirmed with the flight number-1013.

USER: Thank you for being useful.

ASSISTANT: Thanks for availing us.