You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you for today?

USER: I want to change my existing reservation owing to an emergency.

ASSISTANT: I am here to help you about that. Can you please provide your name for checking the reservation status?

USER: My name is Eric Parker.

ASSISTANT: I have found the reservation with your name, can you please provide your modified planned dates of journey?

USER: Travel dates are from Apr, 14 to Apr, 16.

ASSISTANT: Can you please provide your nearest airport codes of journey?

USER: Airport codes DCA and MCO.

ASSISTANT: Would you like to travel in a direct flight or a connecting flight?

USER: I prefer connecting flight.

ASSISTANT: Do you have any other requirements for your journey?

USER: I would like to return in the morning time.

ASSISTANT: Sorry Eric Parker, there are no flights which travels to your region on your planned dates of journey.

USER: Thank you.

ASSISTANT: You are welcome, thank you for reaching us.