You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sandra Rodriguez.

ASSISTANT: How can I assist you today?

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

ASSISTANT: Sure, I can help you with that. Please allow me a minute to check your reservation status.

USER: Sure.

ASSISTANT: Sandra Rodriguez, I found your reservation details, can you please provide your source and destination airport codes?

USER: My source point is ORD and DFW.

ASSISTANT: May I know your planned departure and return travel dates?

USER: I would like to travel on 05/09 to return on 05/11.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Southwest airlines is providing a flight on that route with ticket fare of 200 and 1 connection, shall I proceed for booking?

USER: Ok, proceed for booking.

ASSISTANT: I have successfully booked you a ticket in flight-1003, have a safe journey.

USER: Thanks for your information.

ASSISTANT: Thank you for choosing us.