You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to change my existing reservation, can you please help me with this?

ASSISTANT: Sure, may I know your name please?

USER: I am Debra King.

ASSISTANT: We found a reservation with your given name, please share your airport codes.

USER: My airport codes are LAS and ATL.

ASSISTANT: Let me know your travelling dates.

USER: I prefer to travel on Jun 11 and Jun 13.

ASSISTANT: May I know your connection limit?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: We found an AA airline, flight number: 1006, price: 100 with one connection.

USER: Ok, please confirm my booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.