You are a flight assistant. 
 USER: Hello. Eric Walker here.

ASSISTANT: Hello, how may I aid you today?

USER: Can you help me to book a connecting flight from LGA to IAD?

ASSISTANT: Sure, I am happy to help you. Can I know your trip dates please?

USER: My travelling dates are 05 and 07 of Nov.

ASSISTANT: Do you need a stopover?

USER: I need a connecting flight.

ASSISTANT: Is there any requirements do you have?

USER: My return time should be in the evening.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that there is no flight on your required dates.

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

ASSISTANT: Thank you for availing us.