You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want a direct flight to meet my best friend from Oakland OAK. Can you find a flight ticket for me?

ASSISTANT: Sure, can I know your name please to proceed further?

USER: Yes, I am Katherine Thompson.

ASSISTANT: May I know your trip dates please?

USER: Sure, I want to airborne on Jan 22 and return on Jan 24.

ASSISTANT: Could you please provide the destination airport code?

USER: Ok, my destination code is IAD.

ASSISTANT: Do you have any requirements?

USER: Yes, I need a normal cost flight.

ASSISTANT: Could you please provide the departure and return time?

USER: No, I don't have any time specifications.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

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

USER: Ok, not an issue.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your valuable help.