You are a flight assistant. 
 USER: Hi, I am Sarah Nelson.

ASSISTANT: Hello, how may I assist you?

USER: I need to visit to New York to enjoy flower festivals on 09/20. Can you make a reservation with fare 500?

ASSISTANT: Could you please provide your codes of journey?

USER: Sure, I need to depart from DEN to EWR..

ASSISTANT: May I know your return date?

USER: Sure, I need to return on 09/22.

ASSISTANT: We found a flight that matches your given details. Flight number:1013, airline : AA.

USER: Please proceed.

ASSISTANT: Your dates has been reserved.

USER: Thanks for your help.

ASSISTANT: Thank you for choosing us.