You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: Could you please assist me to make a flight ticket reservation from the airport SFO to reach IAD?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for accepting my request.

ASSISTANT: May I know your good name please?

USER: My name is Scott Carter.

ASSISTANT: Ok, help me with your planned dates.

USER: My planned departure and arrival dates are October 4th and 6th.

ASSISTANT: Do you have any other concerns?

USER: I would prefer to travel in a single stop over flight.

ASSISTANT: Sorry to say that, no flights are found based on your information.

USER: Oh! It is sad to hear from your end. Anyways thank you for searching the flights.

ASSISTANT: Thank you for choosing us.

USER: Most welcome.