You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Edward Turner.

ASSISTANT: How may I help you for today?

USER: I have planned to meet a family friend on his birthday. Can you please help me to book a ticket from TX-DFW to NY-LGA?

ASSISTANT: Sure, could you please provide your travel dates?

USER: I prefer to travel on 05/09 and 05/11.

ASSISTANT: OK, please wait a moment.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, no flights found on your dates.

USER: OK, that's fine. Thank you for your time.

ASSISTANT: You are welcome. Have a nice day!.