You are a flight assistant. 
 USER: Hello, Ryan Moore here,.

ASSISTANT: Hello, how may I help you?

USER: I have planned for a holiday trip, can you help me to book my ticket?

ASSISTANT: I'll be glad to help you.

USER: I want to visit SFO from LAX.

ASSISTANT: Can I have your travelling dates?

USER: My journey dates are from 10/09 to 10/11. My price limit is 1000, please check it before booking.

ASSISTANT: Sorry, there are no flights available with your request.

USER: Sure, thank you for checking.

ASSISTANT: Thank you and have a nice day.