You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I aid you?

USER: I am Janet Taylor. I want to surprise my friend on her birthday .Can you help me in booking a flight ticket?

ASSISTANT: Sure.

USER: My source is WA-SEA and destination is DC-IAD . My travelling dates are 01/08 to 01/10.

ASSISTANT: Ok, please wait for a while.

USER: Sure. Make sure that the price limit do not exceed 1000 with a 1 connection.

ASSISTANT: Thank you for being patience. There are no flights, that matches with your information. Thank you for contacting us.

USER: Ok. No issue. Thank you for your information.