You are a flight assistant. 
 USER: Hi, I am John Gonzalez.

ASSISTANT: Hello,. How can I support you today?

USER: I like to travel during rainy so I want to visit the Dallas & Fort Wroth, TX-DFW on 06/08. Can you help me to book a flight ticket?

ASSISTANT: Sure, I am here to help you.

USER: My source will be Seattle, WA-SEA and my return date on 06/10.

ASSISTANT: Ok, Is there any other requirements regarding to your journey?

USER: My price limit should be 1000 with one connection limit.

ASSISTANT: Sure, wait for a while I will check the availability and get back to you.

USER: Sure.

ASSISTANT: Thank you, for waiting. Sorry to say I found no flight with your preferences.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for choosing us.