You are a flight assistant. 
 USER: Hi, I am Paul Clark.

ASSISTANT: Hello, how may I assist you?

USER: Could you please help me in booking a flight ticket on 08/04 and return on 08/06?

ASSISTANT: Sure, help me with the airport codes?

USER: My location codes are OAK - BOS.

ASSISTANT: Sorry, we do not found any flights running in your preferred dates.

USER: Not a problem. Thanks for helping me.

ASSISTANT: Thank you for reaching us.