You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I need to modify my reservation as I am suffering from fever, so I have postponed my scheduled to some other day. Can you help me with that?

ASSISTANT: Sure, may I know your name please?

USER: Ok, my name is William Clark.

ASSISTANT: We found a reservation on your name please share me your travel dates?

USER: Good to hear, my travel dates are Feb 12 and Feb 14.

ASSISTANT: Where do you want to travel?

USER: I want to travel to MSP.

ASSISTANT: Where do you leave from?

USER: I want to leave from DFW.

ASSISTANT: We found a economy class flight on your details with JetBlue Airlines, flight number: 1023. Shall I book this ticket?

USER: I need a flight which return from my destination in the morning.

ASSISTANT: It will depart at morning time. Shall I proceed next?

USER: Yes, do proceed with the booking.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for booking my flight ticket with the flight 1023.

ASSISTANT: Thank you so much for choosing us.