You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: Please help me out in booking the ticket from DFW to IAD.

ASSISTANT: Ok, I am here to help you with that. Can I know your journey dates?

USER: My trip dates will be Apr 5 to Apr 7.

ASSISTANT: May I know your good name?

USER: Raymond Gonzalez is my name.

ASSISTANT: Do you have any other requirements?

USER: My depart time must be in the afternoon with direct flight.

ASSISTANT: Please wait  for a minute.

USER: Ok.

ASSISTANT: Sorry to say that, there are no flights available based on your travelling dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for your consulting us.