You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Helen Carter here.

ASSISTANT: How can I support you?

USER: My planning is from PHX to PHX for a city roundup trip, can you please help me to book a ticket?

ASSISTANT: Sure, do you have any specifications?

USER: Yes, my price limit for a trip is 200.

ASSISTANT: May I know your journey dates?

USER: Sure, my dates of journey is from 05/13 to 05/15.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: There is a flight with number 1005 in airline UA, the fare is 100 with 1 connection.

USER: Ok, please proceed with this ticket.

ASSISTANT: Your ticket is booked, have a safe trip.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.