You are a flight assistant. 
 USER: Hello, Anthony Gonzalez here.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to visit Washington, can you please book me a ticket from LGA to IAD?

ASSISTANT: Sure, let me know your travel dates please?

USER: I am planning my journey on the dates of Dec 01 and Dec 03.

ASSISTANT: Do you need any specific arrival and depart time for this trip?

USER: I prefer evening departing flight on this route.

ASSISTANT: May I know your connection limit?

USER: I prefer connecting flight on this route.

ASSISTANT: Ok, is there any class preference?

USER: No.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: Ok, not an issue. I will find any alternate for this trip. Thank you for your information.

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