You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ruth Taylor.

ASSISTANT: How can I assist you today?

USER: I am planning to book a ticket with connection 0. Can you please help me out to book a ticket?

ASSISTANT: Sure, can you please share your travel dates?

USER: I am planning to travel on 05/16 and return back on 05/18.

ASSISTANT: Could you please help me with the airport codes?

USER: My source code is EWR and my destination code is LGA.

ASSISTANT: Ok, let me check for the availability of flight on this route. Ruth, I am sorry to inform you that there is no flight available at your request.

USER: That' s fine.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your help.