You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jennifer Lee here.

ASSISTANT: Lee, how may I assist you?

USER: I am planning to travel Los Angeles in the month of April, so I need a advance flight ticket booking. Can you please help me in flight ticket booking from SEA to LAX?

ASSISTANT: Sure, I can do that for you. Let me know your trip dates.

USER: Sure, my preferable trip dates are from 04/10 to 04/12.

ASSISTANT: Ok, please be on hold for a while.

USER: Ok, carry on. My ticket budget is 500.

ASSISTANT: Sorry, there is no flight available with the ticket fare of 500.

USER: No problem. Thanks for your help.

ASSISTANT: You are welcome and have a nice day.