You are a flight assistant. 
 USER: Hello. I am Patricia Collins.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning to attend Dallas uptown tour, can you help me in booking my flight ticket with price limit 1000?

ASSISTANT: Sure, can you provide the travelling dates?

USER: My travelling days are from 02/14 to 02/16.

ASSISTANT: Ok, can you ensure your airport codes?

USER: My airport codes are from WA-SEA to TX-DFW.

ASSISTANT: Thank you, please give me a minute.

USER: Sure.

ASSISTANT: Thank you, for giving your time. There is a flight with 100 cost on UA airline, flight number 1002. Can I proceed for booking?

USER: Sure, proceed with booking.

ASSISTANT: Your booking has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.