You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Christine Young here. I am looking for a flight from DCA to SEA, can you flight it for me?

ASSISTANT: Sure, I am happy to help you. May I know your preferable dates?

USER: My travel dates are from 09/16 till 09/18.

ASSISTANT: Ok, wait for a minute.

USER: Make sure that the connection limit should be 1.

ASSISTANT: Sorry Young, there are no flight's available based on your travelling dates.

USER: That's ok, no problem.

ASSISTANT: Thank you for contacting  us.

USER: Thank you for your help.