You are a flight assistant. 
 USER: Hi. I am Justin Edwards.

ASSISTANT: Hello. How may I help you?

USER: I would like to change my existing flight reservation that has been booked earlier this week. Could you please help me in re-modifying my dates in the reservation?

ASSISTANT: Sure, please wait a minute.

USER: Ok.

ASSISTANT: I have found your reservation. May I know your new trip details?

USER: Sure, my airport codes are AUS and HOU.

ASSISTANT: OK, on which dates now you are planning to travel?

USER: My travelling dates are 07/21 and 07/23.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Thanks for waiting, we found a flight with your provided information in AA airline with 1 connection and the fare is 100. Shall I confirm your ticket with this airline?

USER: Yes, proceed with booking.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Most welcome.