You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you aid me to book a flight ticket from HOU to DCA?

ASSISTANT: Sure, I am here to help you. Can you please let me know your travelling dates?

USER: My trip dates are Jul 5 and Jul 7 respectively.

ASSISTANT: Do you prefer any break in between journey?

USER: I want a connecting flight.

ASSISTANT: Are there any other specifications for you?

USER: No other specifications.

ASSISTANT: May I know your good name?

USER: Ruth Williams here.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: Thank you.

ASSISTANT: Thank you for contacting us.