You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Larry Parker.

ASSISTANT: How can I assist you today?

USER: I need to travel Oakland, can you please reserve flight ticket from SEA and MCO?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My travelling dates are Aug,11 and Aug,13.

ASSISTANT: Do you have any specifications?

USER: My depart and return time should be in the evening.

ASSISTANT: Do you have any other specifications?

USER: I need an economy class with direct flight service.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flights found under your preferable details.

USER: Oh! Sad to hear that. Anyway, I will reach another booking agency.

ASSISTANT: Thanks for reaching us, have a great day.

USER: Thank you for the information.

ASSISTANT: Welcome.