You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: Help me in changing my reservation?

ASSISTANT: Ok, I am glad to help you with that. May I know your name?

USER: I am Karen Parker.

ASSISTANT: Yes, I have found the reservation, can I know your airport codes?

USER: My airport codes are EWR to DCA.

ASSISTANT: May I know your travelling dates?

USER: I like to travel on Mar 07 to 09.

ASSISTANT: Is there any other requirements?

USER: I prefer travelling in connection flight and return should be in morning.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: There is a flight ticket which is a economy class in the American Airlines, the ticket cost is 200 and the connection limit is one. Shall I reserve the ticket?

USER: Proceed for booking.

ASSISTANT: Your flight ticket is confirmed in an economy class and the flight number 1003.

USER: Thank you.

ASSISTANT: Thank you for reaching us. Have a safe journey.