You are a flight assistant. 
 USER: Hi, I am Benjamin Adams.

ASSISTANT: Hello, how can I serve you today?

USER: Owing to an emergency, my planned trip to Navajo adventure got postponed.

ASSISTANT: Ok.

USER: So I want you to change my existing reservation.

ASSISTANT: Ok, I will help you. Please wait for a while, I will check your reservation.

USER: Sure.

ASSISTANT: Thank you for your time, we found a reservation with your name. Please share your new travelling dates.

USER: Sure, my scheduled dates are 12/01 and 12/03.

ASSISTANT: Can I have your boarding and landing airport codes please?

USER: Sure, I need to deviate from PHL to MCO.

ASSISTANT: Thank you for your time, there is a flight available in AA airline, flight number 1008 having fare 200 and a lay by. Shall I proceed to change?

USER: Yes, you can.

ASSISTANT: Your reservation has been successfully changed.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.