You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you today?

USER: I want to change my reservation, can you help me in that?

ASSISTANT: Sure, may I know your name please?

USER: I am Robert Evans.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: We found a reservation with your given name, can you please provide your airport codes?

USER: My airport codes are DFW to LAX.

ASSISTANT: May I know your planned travel dates?

USER: I like to travel on Nov 12 to 14.

ASSISTANT: Do you have any other requirements?

USER: I prefer to travel in single connection flight in normal-cost airlines.

ASSISTANT: We found a flight with an airline Delta of flight 1011 in an economy class with single connection. Can I proceed?

USER: Proceed for booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you.