You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Betty Allen.

ASSISTANT: How may I assist you?

USER: I would like to book a ticket from LAX to IAD, can you please help me out?

ASSISTANT: Sure, I am here to help you with that. May I know your travelling dates please?

USER: I am travelling on these dates July 1st and 3rd.

ASSISTANT: please share if you want to travel in any specific time?

USER: I prefer departure time in the afternoon.

ASSISTANT: Do you prefer either business or economy class?

USER: I don't have any class preference. I need a single connected flight.

ASSISTANT: Can you please share your airline preferences?

USER: I don't have any preference.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Betty Allen, there are no flights available on your preferable dates.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for choosing us.