You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am James Allen.

ASSISTANT: How may I help you out?

USER: I want to visit Oakland OAK city to meet my best friend from DCA. Can you make  a reservation for me?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Thank you for accepting my request. my itinerary dates are on May 31 and return on June 02.

ASSISTANT: Do you have any preferences?

USER: Yes, I need a normal cost flight.

ASSISTANT: Sorry, there are no flights found.

USER: Ok, that's fine, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.