You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be help to you?

USER: I want to book my sister's ticket. Can you please help me to book her ticket from EWR to PHX?

ASSISTANT: Sure, may I know the preferred travelling dates to proceed further?

USER: She want to depart on 03/19 and return back from PHX on 03/21.

ASSISTANT: Ok, could you please tell her name to book the ticket?

USER: Sure, her name is Emma Mitchell.

ASSISTANT: Spirit airline is available with connection 1 and the price limit is 100. Do you like me to proceed?

USER: That's good, you can proceed.

ASSISTANT: Your ticket has been booked successfully. Thank you for choosing us.

USER: You are welcome.