You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you the best today at this moment?

USER: I need to modify my reservation as I am suffering for health issue. Can you help me with that?

ASSISTANT: May I know your good name please?

USER: Thank you for considering my request. My name is Joseph Moore.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: We are happy to inform you that there is a reservation found with your given name. Can you please mention your airport codes?

USER: Good to hear, my airport codes are DCA and PHL.

ASSISTANT: When you are willing to travel?

USER: I am willing to travel from Jan 28 to Jan 30.

ASSISTANT: Please share me your specifications.

USER: I need a connected flight in an normal-cost airlines.

ASSISTANT: We have found a flight with an American airlines of flight 1000 in an economy class with connection limit is 1. Would you like me to proceed?

USER: Yes, do proceed with the booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for choosing us.