You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Could you please help me to book a flight ticket from DCA to LGA?

ASSISTANT:  Sure, may I know your preferable dates of journey?

USER: My journey dates are June 10 and June 12.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Are there any other specifications?

USER: I prefer an economy class.

ASSISTANT: Can I know your good name?

USER: I am Ruth Hill.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for reaching us.