You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you help me change my existing reservation due to my interview got postponed?

ASSISTANT: Sure, may I know your name?

USER: My name is Jerry Thompson.

ASSISTANT: Please wait for a while, I will check and revert you.

USER: Ok.

ASSISTANT: We found a reservation on your name, can you please share your new reservation details?

USER: I need to travel from IAD to reach DCA.

ASSISTANT: May I know your trip dates?

USER: My planned dates are 05/18 and 05/20.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: We found a Spirit airline with flight number 1023 having a single connection and fare is 100.

USER: Ok, proceed with this booking.

ASSISTANT: Shall I proceed with booking?

USER: Yes please.

ASSISTANT: Ok. Your booking has been done.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us, have a good day.