You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you at this moment?

USER: Can you please book a ticket from HOU to DCA to meet my childhood friend?

ASSISTANT: On which dates would you like to travel?

USER: My travelling dates are Oct 2 and Oct 4.

ASSISTANT: Do you need a lay by in between the journey?

USER: I want single connected flight.

ASSISTANT: May I know good name please?

USER: I am Christine Smith.

ASSISTANT: Do you have any other preferences?

USER: My return time is afternoon.

ASSISTANT: Ok, please wait for few minutes.

USER: Ok.

ASSISTANT: There are no flights found on your requested dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.