You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: My name is Angela Collins. I want to do some changes in my existing reservation, can you help me for that?

ASSISTANT: Sure, I am glad to help you with that.

USER: Thank you.

ASSISTANT: Happy to inform you that, I found your reservation. Can you please tell me your new travelling airport codes?

USER: My travelling airport codes are from LAS to DTW?

ASSISTANT: On which dates you want to travel?

USER: My travelling dates are 09/13 and 09/15.

ASSISTANT: Please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Flight 1005 in AA airline is available for you with 1 stopover and fare is 100. Shall I proceed?

USER: Ok, please proceed for booking.

ASSISTANT: Your booking is done.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us, have a safe flight.

USER: Welcome.