You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jeffrey Parker here. Can you please reserve me a flight ticket from LGA to LAX?

ASSISTANT: Can you please provide with the travel dates?

USER: Sure, my travel dates are from Aug 17 to Aug 19.

ASSISTANT: Give me a moment.

USER: Sure. Please make sure that my airline preference should be in normal cost.

ASSISTANT: Do you have any other preferences?

USER: I need a connecting flight.

ASSISTANT: I regret to inform that, there are no flights  available on your desired dates.

USER: That's ok, no problem. Anyway thank you for the information.

ASSISTANT: Thank you for reaching us.