You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Will you please book me a plane ticket from LAX to IAD?

ASSISTANT: May I know your travelling dates?

USER: I will leave on Aug 18th and return on Aug 20th.

ASSISTANT: Do you have connection limit?

USER: Yes, I need 1 lay by.

ASSISTANT: May I know your name?

USER: I am Donna Hall.

ASSISTANT: There is a flight ticket with fare 100 and 1008 as flight number in Delta Airline. Shall I proceed with booking?

USER: Fine, please proceed.

ASSISTANT: Your ticket is confirmed.

USER: Thanks for your service.

ASSISTANT: Thank you for reaching us.