You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I would like to book a ticket from DCA to HOU, can you please help me with that?

ASSISTANT: Sure, can you please mention your departure and arrival dates of your journey?

USER: The travel dates are from 02/26 to 02/28.

ASSISTANT: Do you need any layover in between  journey?

USER: No.

ASSISTANT: Is there any other specifications regarding your journey?

USER: No.

ASSISTANT: May I know your name for the documentation process?

USER: Janet Thomas here.

ASSISTANT: Thank you for the information, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.