You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can I know if there is a chance to amend my recent reservation I did last week?

ASSISTANT: Sure, may I know your good name please?

USER: Ok, please check for the name Gary Thomas.

ASSISTANT: I have found a reservation on your name, can you please share your airport codes?

USER: Yes, my new airport codes are CLT which is my origin and IAD is my destination.

ASSISTANT: May I know your planned travel dates please?

USER: Ok, my new dates of journey are May 19 and May 21 respectively.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: Ok, please book a flight which has a single connecting limit.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: We found Delta airline with economy class and flight number is 1016 with arrival time is 13 hours and departure time is 20 hours.Shall I proceed for booking?

USER: Please make the change for my reservation, the flight intents are perfect.

ASSISTANT: Your ticket is booked.

USER: Thank you for assisting me.

ASSISTANT: You are welcome.