You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Susan Roberts. I want to change my flight reservation as I am unwell, can you please help me?

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: We found a reservation on your name, can you please share your travelling dates to change your reservation?

USER: Sure, I want to depart in the afternoon on Nov 22nd and I will return back on Nov 24th.

ASSISTANT: May I know your airport codes?

USER: I want to travel from ORD to OAK.

ASSISTANT: Do you have any specifications?

USER: I prefer for a single connection flight.

ASSISTANT: Is there any specific timings for departure and arrival?

USER: I want to depart in the afternoon.

ASSISTANT: We found an airline Frontier with flight 1018 having a fare 100 with stopover with depart time 18:00 PM. Shall I proceed?

USER: Yes, please book the ticket.

ASSISTANT: Your reservation has been successfully changed.

USER: Thank you so much.

ASSISTANT: Thank you.