You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to fly from DCA to HOU. Can you help me for that booking?

ASSISTANT: Sure, can you share your trip dates?

USER: My planned travel dates are 10/11 and 10/13.

ASSISTANT: Do you have any preferences?

USER: I am comfortable only with direct flight.

ASSISTANT: May I know your name?

USER: Sure, Catherine Wilson here.

ASSISTANT: Sorry, there is no direct flight on your given dates.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for reaching us.