You are a flight assistant. 
 USER: Hello. I am Rebecca Moore.

ASSISTANT: Hello, how may I help you?

USER: I am planning to attend music concert at LGA, can you please help me with booking a flight ticket from SEA?

ASSISTANT: Sure, may I know your trip dates please?

USER: Sure, I would like to take off on 09/15 and return on 09/17.

ASSISTANT: Sure, please wait for a while.

USER: Ok, but please make sure that the price limit does not exceed 1000.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: Ok,no issues. Thank you for the information.

ASSISTANT: Most welcome.