You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to book a flight from OAK - SEA, can you help me?

ASSISTANT: Sure, can I know the travel dates please?

USER: I will be travelling on 08/18 to 08/20.

ASSISTANT: May I know your name please for proceeding further?

USER: Myself Patrica Martin.

ASSISTANT: Sorry Martin, there are no flights as per your request.

USER: Oh! No issues with it, thank you for checking.

ASSISTANT: Thank you for approaching us.

USER: Welcome.