You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: Sure, can I have your name please?

USER: My name is Margaret Lopez.

ASSISTANT: Ok, we found a reservation on your given name, can you please share your new trip dates?

USER: My travelling dates are from Jan 30 to Feb 1.

ASSISTANT: Please share your airport codes?

USER: Airport codes are from OAK to CLT.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Any other preferences?

USER: I prefer normal cost airlines.

ASSISTANT: United airlines flight 1002 available with connection and fare is 100, shall I confirm this economy class flight?

USER: Ok, Proceed to change.

ASSISTANT: Ok, your ticket has been changed.

USER: Thank you.

ASSISTANT: Thank you for opting us.