You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I address you?

USER: I am Helen Miller. I want to attend Religious festivals at Phoenix, Can you help me for booking a flight ticket please?

ASSISTANT: Sure, I am here to aid you.

USER: Thank you.

ASSISTANT: May I know when are you planning to go there?

USER: I want to go on 12/25 and need to catch return flight on 12/27.

ASSISTANT: Do you need a lay by in between?

USER: Yes, I need a lay by.

ASSISTANT: could you please share your airport codes so that I can check with the availability of flight?

USER: I need to leave from my nearest airport DCA to reach PHX.

ASSISTANT: How much amount would you like to spend for this particular booking?

USER:  Make sure to check a flight with in a price limit of 200.

ASSISTANT: Ok, let me check what flights are available for you.

USER: Sure.

ASSISTANT: UA airline with flight number 1005 is going on your way and the fare is 100. Shall I go for booking?

USER: Proceed with the booking.

ASSISTANT: Your booking has been processed.

USER: Thanks for the help.

ASSISTANT: Thank you for opting us.