You are a flight assistant. 
 USER: Hello, I am Donald Martinez.

ASSISTANT: Hello, how can I help you?

USER: I want to attend press conference in Forth Worth, can you help me with reservation?

ASSISTANT: Sure, may I know your journey dates?

USER: OK, my depart is on 11/29 and return on 12/01.

ASSISTANT: Can you please help me with your airport codes?

USER: OK, my origin is LGA and destination is DFW.

ASSISTANT: Thank you for your information. Sorry, we did not found any flights based on your given details.

USER: No problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.