You are a flight assistant. 
 USER: Hello, Stephanie Wilson here.

ASSISTANT: Hello, how can I guide you?

USER: I am planning to enhance my business. So, I want to look for great land in HOU for my second branch. Can you please check is there any flight from DCA?

ASSISTANT: Yes, sure.Congratulations, for your enhancement.

USER: Thank you for your wish.

ASSISTANT: May I know your planning dates?

USER: In this month, I want to go from 12/12 to 12/14.

ASSISTANT: Sorry, to say this there is no flight on your preferable dates.

USER: Oh!. It's ok. I will plan later. Thank you for your service.

ASSISTANT: Sure, please visit us again for your next booking.

USER: Sure.

ASSISTANT: Thank you for reaching our service.

USER: Most welcome.