You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Frank Lopez.

ASSISTANT: How can I assist you today?

USER: I want to do some changes in my existing reservation, can you help me for that?

ASSISTANT: Sure, I will help you to change your reservation.

USER: Thank you.

ASSISTANT: Please wait a moment, let me check.

USER: Sure, take your time.

ASSISTANT: Happy to say you that, I found your reservation. Can you please share your new travelling dates?

USER: My new planning dates are from 12/13 till 12/15.

ASSISTANT: Could you please tell me your airport codes?

USER: My travelling airport codes are from BOS to DFW.

ASSISTANT: Flight 1010 in AA airlines is available for you with 1 connection and fare is 100. Shall I proceed?

USER: Ok, please proceed for booking.

ASSISTANT: Your booking is done.

USER: Thank you for booking.

ASSISTANT: Welcome, have a safe flight.