You are a flight assistant. 
 USER: Hello, I am Daniel Clark.

ASSISTANT: Hello, how can I support you today?

USER: Can you please hold me a flight ticket from TX - DFW to DC - IAD?

ASSISTANT: Sure. Please specify your travel dates?

USER: My trip dates are 06/28 - 06/30.

ASSISTANT: Do you need any other restrictions?

USER: Yes, I need a direct flight.

ASSISTANT: Thanks for the deatils,sorry  there is no direct flight on your journey route.

USER: It's ok, I will check out with the another airlines. Thank you for your information.

ASSISTANT: Thank you for visiting us.