You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I aid you?

USER: I am Joseph Scott. Can you help me in booking a flight ticket from OAK to IAD?

ASSISTANT: Sure, I am here to help you out. Can you please share your travel dates?

USER: I want to travel on 06/10, and need to catch return flight on 06/12.

ASSISTANT: May I know your airline preference?

USER: I am comfortable with any airline.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a single connection.

ASSISTANT: Which class do you prefer for your journey?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other requirements?

USER: I want to depart in the afternoon time.

ASSISTANT: Ok, please be on hold. Let me check with the flight availability.

USER: Sure.

ASSISTANT: Sorry, there are no flight as per your travelling details.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for approaching us.