You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket from Washington so, can you please book a ticket in business class?

ASSISTANT: Yes, I will definitely try my best to help you in booking your flight ticket. Could you please provide your planned dates of journey?

USER: My travelling dates are May 12 and May 14.

ASSISTANT: May I know your airport codes?

USER: I want to start from IAD to LGA.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: At which time you want to travel?

USER: I want to return in the evening.

ASSISTANT: Sorry to say, there are no flights available for your desired connection.

USER: That's ok, thank you for the response.

ASSISTANT: May I know your name?

USER: My name is Michelle Jones.

ASSISTANT: Thanks for reaching us.