You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Susan Moore.

ASSISTANT: How could I aid you today?

USER: I need to change my existing reservation as my exams got postponed, Can you please help me with that?

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: We are happy to inform you that we have found a reservation with your given name. Can you please provide me your new reservation details?

USER: I would like to travel on 07/27 to 07/29. My source point is HOU to detsination point is CLT.

ASSISTANT: Just hold on a moment.

USER: Sure.

ASSISTANT: There is an airline called Delta of flight 1015 and price is 300 with lay by in an economic class. Can I proceed with the booking?

USER: Ok, proceed for booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for your information.

ASSISTANT: Thank you for availing us.