You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Michelle Hill.

ASSISTANT: How may I help you?

USER: I want to book a ticket from LGA to DCA to attend seminar, can you help me in booking?

ASSISTANT: Sure, I am perky to help you. On which dates would you like me to book the flight?

USER: I am departing on Oct 11 and return on Oct 13.

ASSISTANT: Do you have any preferences?

USER: I need a flight with connection limit 0.

ASSISTANT: Thanks for providing details, sorry no flights are available on your journey dates.

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

ASSISTANT: Thank you for reaching us.