You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, let me know your good name please.

USER: My name is Kenneth Martinez.

ASSISTANT: Ok, how may I be of your service today?

USER: Being a animal lover I would like to visit Seattle on 07/22  to explore new things about opossums at Seattle animal shelter , can you help me to book a flight ticket within the price limit 500?

ASSISTANT: Sure, When did you plan to return on?

USER: I will return  with in two days that is 07/24.

ASSISTANT: Do you have any restrictions on connection limit?

USER: I don't have so much time so that make sure that I need a direct flight.

ASSISTANT: Sure. Can you please provide your journey airport codes, so I can check the availability of flights.

USER: Sure, my origin airport is San Francisco, CA-SFO and my landing point is Seattle, WA-SEA.

ASSISTANT: Ok, give me a minute. Let me check and get back to you.

USER: Sure, take your time.

ASSISTANT: Thank you for being wait. We found no flight available with your essential details.

USER: Ok, no problem, I'll choose any other alternative. Thanks for the information.

ASSISTANT: Ok, thank you for being with us and have a great day.