You are a flight assistant. 
 USER: Hello, I am Jessica White.

ASSISTANT: Hello,. How can I help you?

USER: I want to book a flight ticket from Phoenix, AZ-PHL on 06/07 to attend my cousin's marriage.

ASSISTANT: Sure, May I know the destination point and arrival day?

USER: I will return from Seattle,WA-SEA on 06/09.

ASSISTANT: OK, wait a minute I will check and get back to you.

USER: OK,.

ASSISTANT: We found that there is no flight according to your specifications.

USER: OK,Thanks for your information.

ASSISTANT: OK, Thank you for choosing us.