You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Timothy Williams here. My interview has been postponed, so I want to reschedule my itinerary dates.

ASSISTANT: Sure, please wait a moment I will check your reservation details and proceed further.

USER: Ok.

ASSISTANT: I found a reservation on your name. Could you please provide your new airport codes?

USER: My genesis and terminus airport codes are LAX and DTW.

ASSISTANT: Ok, may I know your travelling dates to search or the flight?

USER: My itinerary dates are 09/27 and 09/29.

ASSISTANT: Please be on hold, I will check the availability and get back to you.

USER: Sure.

ASSISTANT: Ok, there is a flight 1004 in Frontier airline matching your details with price 200. Shall I proceed?

USER: Please book my ticket.

ASSISTANT: Ok, your booking is done.

USER: Thank you for assisting me.

ASSISTANT: You are welcome.