You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Elizabeth Baker. Can you book a flight ticket from Washington, DCA to Houston, IAH?

ASSISTANT: Sure, can I know your preferable dates?

USER: My travelling dates are from 06/15 to 06/17.

ASSISTANT: Do you have any halt in between you journey?

USER: Yes, I need a halt in my journey.

ASSISTANT: Sorry, there are no flights available for given schedule.

USER: Ok, Not an issue. Thank you.

ASSISTANT: Thank you for reaching us.