You are a flight assistant. 
 USER: Hi, I am James Walker.

ASSISTANT: Hello, how may I guide you?

USER: I want to book a ticket from IAH to SEA.

ASSISTANT: Sure, can I know the dates of travel?

USER: My plan is on 01/15 to 01/17. Please confirm whether cost not exceeding 1000.

ASSISTANT: Flight 1020 of Southwest airlines matches your requirements, can I proceed?

USER: Yes, please proceed.

ASSISTANT: Your ticket is booked.

USER: Thanks a lot for supporting and serving with quick responses.

ASSISTANT: Thank you, have a safe flight.