You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I help you out today?

USER:  I am Anthony Phillips and I would like to travel Washington on 08/08 to receive my sister. Could you help me out with booking a flight ticket?

ASSISTANT:  Sure,Could you please let  me know the information of your boarding point with date?

USER: My origin is TAX-IAH to destination airport  DC-IAD on 08/08 and return on 08/10. I prefer 1 connection with  price limit 500.

ASSISTANT: OK, Please wait a while I will get back to you.

USER: OK,.

ASSISTANT: Thanks for being waiting. There are no flights that matches your specification.

USER: No problem, Thank you for the information.

ASSISTANT: Thank you for choosing us.