You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Ashley Evans.

ASSISTANT: How can I assist you?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your own time.

ASSISTANT: I have found your reservation, can you please let me know your new travelling airport codes?

USER: My nearest airport codes are ATL and DTW.

ASSISTANT: Please share your travelling dates to change the reservation?

USER: My journey dates are 12/03 and 12/05.

ASSISTANT: Here is flight ticket on your preferable dates and the ticket fare is 200 and 1019 as flight number.Shall I change your reservation to this flight?

USER: Sure, you can proceed with that.

ASSISTANT: Ok, ticket details are successfully changed.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us.