You are a flight assistant. 
 USER: Hi,. I am Rachel Lee.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, we are happy to inform you that there is a reservation found on your name. Could you please provide your new planned trip dates?

USER: It's very nice to hear from your side. My new journey dates are June 19 and June 21.

ASSISTANT: Please share your airport codes.

USER: My airport codes are LAX and LAS.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: We found a flight with single connection and price is 100 of 1000 flight. Shall I proceed for booking?

USER: Please reserve my seat.

ASSISTANT: Your ticket has been confirmed with Delta airline and economy class.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.