You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Paul Scott,want to travel from OAK to IAD.

ASSISTANT: So, I want to book you a flight ticket?

USER: Yes.

ASSISTANT: Sure, I will can you provide me your travelling dates?

USER: Sure,my travelling dates will be from 01/18 to 01/20.

ASSISTANT: Do you have any limitations on your price and connectionlimit?

USER: The flight should be with 1 connection and the price should be with in 200.

ASSISTANT: Paul Scott unfortunately there is no flights which matches your requirements. Thank you for reaching us.

USER: It's OK.