You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Anna Williams.

ASSISTANT: How can I assist you now?

USER: Can you help me in booking a ticket from DCA to HOU?

ASSISTANT: Sure, I will help you with that. Can I have your travel dates please?

USER: Please find a 0 connection flight on dates 10/26 and 10/28.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Anna Williams, no flight is available to you on your dates.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.