You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Anna Mitchell.

ASSISTANT: How can I assist you?

USER: Can you help me booking a flight ticket from LGA to IAD?

ASSISTANT: Sure, can I know the travel dates please?

USER: I will start on Sept, 19 and return on Sept, 21.

ASSISTANT: Do you have any requirements?

USER: I need a direct flight.

ASSISTANT: Sorry, there are no direct flights available on your route.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for approaching us.