You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I would like to book a flight ticket from LAS and OAK. Can you help me with that?

ASSISTANT: Sure, when would you like to travel?

USER: My trip dates are 06/03 and 06/05.

ASSISTANT: Do you have any preferences?

USER: I need a connecting flight in economy class.

ASSISTANT: May I know your name please?

USER: I am Susan Johnson, and I need normal cost airlines.

ASSISTANT: Thank you for your details, we did not find any flights running in your desired routes.

USER: That's ok, thank you for your service.

ASSISTANT: Thank you for reaching us.