You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: I want to fly from IAD to DFW. Can you check the flight availability on that route?

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

USER: My planned travel dates are 09/08 and 09/10.

ASSISTANT: Ok, I need a single connecting flight?

USER: I want a flight with single connection with in the normal cost only.

ASSISTANT: may I know your good name?

USER: Sure, Richard Rodriguez here.

ASSISTANT: Please wait for a minute.

USER: Sure.

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

USER: No issues, thank you for your time.

ASSISTANT: Thank you for reaching us.