You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Could you please book a flight ticket from DCA to IAH?

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

USER: My travelling dates are Aug 08 and Aug 10.

ASSISTANT: Do you prefer any break in between journey?

USER: I need a direct flight.

ASSISTANT: Are there any other specifications for you?

USER: I want to return in the morning.

ASSISTANT: May I know your good name?

USER: I am Eric Wright.

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

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for contacting us.