You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Deborah Lopez. I am planning to book a ticket from DFW to meet my family. Can you please help me out?

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

USER: I am planning to travel on 05/29 and return back on 05/31.

ASSISTANT: Could you please help me with the destination airport code?

USER: My destination code is LGA.

ASSISTANT: Let me check for the availability of flight.

USER: Sure.

ASSISTANT: Deborah, there is no flight available at your requested dates.

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

ASSISTANT: You are welcome.