You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Rebecca Harris.

ASSISTANT: How may I be of your helping hand?

USER: I need to change my existing reservation, can you please help me out?

ASSISTANT: Sure, please stay online.

USER: I will be waiting for your reply.

ASSISTANT: Thank you for your time, we found a reservation in your name. Can you please your journey details?

USER: My new travelling airport codes are DTW and AUS. My travelling dates are 06/05 and 06/07.

ASSISTANT: We found a flight in an airline Frontier with 1027 number having a single connection price of 200. Shall I proceed?

USER: Please proceed with the reservation.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for changing in my reservation.

ASSISTANT: Thank you for reaching us.