You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I want to change my reservation as location of my exams got changed, can you please help me with that?

ASSISTANT: Sure, I am here to help you. May I know your name for checking existing reservation?

USER: Charles Miller here.

ASSISTANT: Reservation found with your name. Please share your airport codes.

USER: My airport codes are OAK to JFK.

ASSISTANT: Can I know your travelling dates?

USER: My trip dates are in Apr from 26th to 28th.

ASSISTANT: Do you have any connection limit?

USER: I want a single connecting flight.

ASSISTANT: Do you have any specific class preference?

USER: No, thanks for asking.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: There is a direct flight in economy class with Spirit Airlines and ticket fare of 100. Shall I proceed?

USER: Yes, proceed.

ASSISTANT: Your ticket is reserved with flight 1025 and your depart time is 13:00PM. arrival is at 16:00PM.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.