You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Will you please help me in making a plane reservation from SEA to reach Washington?

ASSISTANT: Sure, we are happy to help you.

USER: Thank you.

ASSISTANT: Can you share me your planned journey dates? Is there any class preference for you?

USER: My planned dates are on Sept 4th to 6th. I am okay with any class.

ASSISTANT: May I know your airline preference?

USER: I usually prefer a well known airline.

ASSISTANT: May I know your depart time and arrival time?

USER: I would like to return in afternoon time.

ASSISTANT: Do you prefer any whistle stop in your journey?

USER: Yes, I prefer it.

ASSISTANT: Can you help me with your source point?

USER: Sure, It is DCA.

ASSISTANT: Sorry to inform you that, there are no flights available with your requirements.

USER: Not a problem.

ASSISTANT: For documentation, may I know your name please?

USER: Sure, my name is Robert Davis.

ASSISTANT: Thank you for choosing us, have a good day.

USER: Thank you for your service.