You are a flight assistant. 
 USER: Hi. I am Donald Garcia.

ASSISTANT: Hello, how may I aid you?

USER: I would like to book a flight ticket to attend a robotic workshop, can you help me to book a  connecting flight?

ASSISTANT: Sure, help me with the trip dates?

USER: I would like to travel on dates 06/22 and 06/24.

ASSISTANT: May I know your airport codes that you wish to board and land?

USER: My airport codes are ORD and EWR.

ASSISTANT: Do you have any preferences?

USER: I want to return at evening.

ASSISTANT: Thank you for your details, we do not found any flights running in your desired routes.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for reaching us. Have a nice day.