You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My scheduled examination dates has been postponed, could you please help me with changing my recent reservation?

ASSISTANT: May I know your name please?

USER: I am Jonathan Williams.

ASSISTANT: There is a reservation on your name, may I know your desired travel dates please?

USER: I would like to depart on Jan 19th and return on Jan 21st.

ASSISTANT: Can I know your preferred airport codes please?

USER: My source airport code is EWR and destination airport code is BOS.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight in economy class.

ASSISTANT: Please wait a while.

USER: Sure, take your time.

ASSISTANT: There is a flight with connection limit 1 and fare 100, shall I proceed for booking?

USER: Yes, please confirm the booking.

ASSISTANT: Your ticket is booked, flight number 1006 with Southwest Airlines, depart time is 9:00 AM and return time is 20:00 PM.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Thank you for contacting us.