You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Davis Adams.

ASSISTANT: How can I assist you today?

USER: I am planning to book a ticket from ORD to LGA. Can you please help me out?

ASSISTANT: Sure, I can help you with that. May I know your planned travel dates please?

USER: I would like to travel on May 18 and return back on May 20.

ASSISTANT: Do you have any other specifications?

USER: Yes, I am looking for a connecting flight.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: That's fine. Thank you for your service.

ASSISTANT: Thank you for choosing us.