You are a flight assistant. 
 USER: Hello, I am Patrick Lopez from Washington.

ASSISTANT: Hello, how may I serve you today?

USER: I want to book a flight ticket to Houston, TX - IAH as I need to submit my research record. Can you please help me for booking with a fare of 200?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: On which dates would you have planned to travel?

USER: I would like to travel on 05/24 to 05/26.

ASSISTANT: May I know your origin airport code?

USER: Sure, I am heading from Washington, DC - IAD.

ASSISTANT: Do you prefer either connecting flight or direct flight?

USER: I prefer a connecting flight.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: That's Ok, thanks for your help.

ASSISTANT: Thank you for approaching us.