You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Sandra Adams, I want to book a flight ticket for my journey to OAK from IAD to meet my relative over there.

ASSISTANT: Sure, I will help you in booking the ticket.

USER: Thank you.

ASSISTANT: May I know your travelling dates too?

USER: Sure, my travelling dates are 12/02 and 12/04. Make sure there should be a direct flight for my journey.

ASSISTANT: Sorry, there are no flights found in our database.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Thank you for choosing us.