You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I want to change my existing reservation, due to health issues. Can you please help me?

ASSISTANT: Sure, I am here to help you, with that, can I know your good name?

USER: My name is Lisa Young.

ASSISTANT: I found your reservation, may I know your new travelling dates?

USER: My travelling dates are Aug 12 and Aug 14.

ASSISTANT: Please mention your travelling airport codes.

USER: My airport codes are CLT and HOU.

ASSISTANT: Do you have any specifications?

USER: My airline preference is normal-cost.

ASSISTANT: I found a flight with the price of 300 having one connection and normal cost airline. Can I proceed to booking?

USER: Ok, please book.

ASSISTANT: Your ticket is booked with the flight- 1017.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.