You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

USER: I want to reserve my ticket from ORD to LGA to visit New York, can you please help me in booking?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: Sure, my planned dates of journey are from Dec, 27 to Dec, 29.

ASSISTANT: On whose name I have to book the flight ticket?

USER: Sure, my name is James Anderson.

ASSISTANT: Do you have any connection limit?

USER: Yes, I want to fly in a connecting flight.

ASSISTANT: Any more specifications do you have?

USER: Not required.

ASSISTANT: We regret to inform you that, there are no flights available for your journey with your requested dates of travelling.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for approaching us, have a great day.