You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I am Patricia Davis here, I want to reserve my ticket within the price limit of 500, can you please help me to book a ticket?

ASSISTANT: Sure, I am happy to help you. Can you please provide us your airport codes?

USER: Sure, my respective airports codes are from SEA to LAX.

ASSISTANT: Ok, let me know your travel dates.

USER: Ok, my dates of journey is from 08/29 to 08/31.

ASSISTANT: Flight-1004 is available with UA airlines and the ticket fare is 200 only. Is it ok for you?

USER: Ok, please go ahead with this ticket booking.

ASSISTANT: Your ticket is booked and have a nice day.

USER: Thank you for your help.

ASSISTANT: You are welcome and thank you for choosing us.