You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you?

USER: Please book a flight ticket from MCO to LGA.

ASSISTANT: Sure. Tell me your travel dates please?

USER: My trip dates are 05/09 and 05/11.

ASSISTANT: May I know your name please?

USER: Edward Lopez here.

ASSISTANT: Are you looking for a stopover in your journey?

USER: No, I need a direct flight.

ASSISTANT: Any other preferences?

USER: I prefer to travel in economy class. I want to return with an evening flight.

ASSISTANT: Please wait.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

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

ASSISTANT: Thank you.