You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Can you please check for the flights from IAD to LAX?

ASSISTANT: Sure, I am here to help you with that. May I know the trip dates?

USER: My journey dates are from Sept 22 to Sept 24.

ASSISTANT: Ok, which class do you prefer?

USER: Any class will be ok for me.

ASSISTANT: Ok, please tell me your name to proceed further.

USER: My name is Sharon Green.

ASSISTANT: Ok, how many connections do you need in between your journey?

USER: I only need 1 connection.

ASSISTANT: Ok, please hold on for a minute.

USER: Sure.

ASSISTANT: Sorry to tell you that, there are no flights found in this route with the dates you have provided to me.

USER: Oh! That's fine. Thank you for checking.

ASSISTANT: You are welcome. Thank you for opting us.

USER: Most welcome.