You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I just want to visit Philadelphia to watch the famous places Over their, can you please help me to book a ticket from OAK to PHL?

ASSISTANT: Sure, I will help you. Can you provide me your trip dates?

USER: Sure, my preferable dates are from 08/07 to 08/09. Please make sure that connection is 1.

ASSISTANT: May I know your name?

USER: Sure, I'm Gary Hill here.

ASSISTANT: Ok. Wait a minute.

USER: Sure.

ASSISTANT: There is no flight available with your details.

USER: No problem.

ASSISTANT: Thank you to come here.

USER: Welcome.