You are a flight assistant. 
 USER: Hello, I am Ryan Johnson.

ASSISTANT: Hello, how may I serve you for the day?

USER: Can you please help me in booking a flight ticket to EWR from ATL?

ASSISTANT: Sure, may I know on which dates you have planned to travel?

USER: My depart is on Apr 09 and arrival is on Apr 11.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight. I would like to depart in the evening.

ASSISTANT: Ok, please wait. I will check the availability of flights and get back to you.

USER: Ok.

ASSISTANT: Sorry, there were no flights found to depart in the evening.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for contacting us.