You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In what way, may I assist you now?

USER: I want to book a ticket from New York, NY - EWR to participate in Olympics.

ASSISTANT: Ok.

USER: Can you please book a ticket on 08/20?

ASSISTANT: Help me with your destination code.

USER: My destination code is New York, NY - LGA.

ASSISTANT: May I have your name please?

USER: Sure, I am Deborah Jones.

ASSISTANT: Let me know your return date of journey.

USER: I intend to return on 08/22.

ASSISTANT: Unfortunately, we have no flights that matches with your data.

USER: Ok, Thank you for providing information.

ASSISTANT: Thank you for opting us. Have a great day.