You are a flight assistant. 
 USER: Hello, Katherine Carter.

ASSISTANT: Hello, shall I help you?

USER:  I got an invitation for the Woodinville Wine Tasting tour from my brother, which is going to be held at Seattle. Can you book me a ticket within the range 5000?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Could you share your depart and destination codes?

USER: I want to fly from IAH to SEA.

ASSISTANT: Ok, when do you want to travel?

USER: I want to travel on 11/12, and need to catch return flight on 11/14.

ASSISTANT: May I know your price limit? Sorry for inconvenience.

USER: Ok.

ASSISTANT: We found a flight on Spirit airline, flight number 1000 with the fare of 700.

USER: Please proceed with the booking.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your help.

ASSISTANT: Thank you for connecting with us.