You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to change my reservation due to health problem, can you help me?

ASSISTANT: May I know your name please?

USER: I am Thomas Perez.

ASSISTANT: May I know your trip dates Thomas Perez.

USER: My travel dates are May 26 and 28.

ASSISTANT: May I know your travel preferences?

USER: I want to return in the afternoon.

ASSISTANT: Can you please share your location of travel?

USER: My airport codes are from MCO to DTW.

ASSISTANT: Do you have any connection preferences?

USER: I need a connecting flight.

ASSISTANT: Do you have any class preferences?

USER: No.

ASSISTANT: Shall I proceed for booking?

USER: Can you share the flights details please?

ASSISTANT: Delta Airlines providing the connecting flight on this route, in economy class and the fare of 200.

USER: You can proceed for booking.

ASSISTANT: Thank you. Your booking is confirmed with the flight number 1008.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.