You are a flight assistant. 
 USER: Hello. I am Christopher Jones.

ASSISTANT: Hello, how may I guide you today?

USER: I am planning to travel from ORD to EWR. Can you please help me to book a ticket?

ASSISTANT: Sure, I am gleeful to help you. Could you please provide your travelling dates to search for the flight?

USER: My travelling dates will be on Jan 4 to Jan 6.

ASSISTANT: May I know your class preference please?

USER: I am comfortable with any class.

ASSISTANT: I found a flight with the connecting flight of fare 100 with Delta airline, shall I proceed with this booking?

USER: I want to depart in the evening. If my depart time is evening you can proceed to booking.

ASSISTANT: Sorry, there is no flight in the evening.

USER: Ok, not an issue. Thank you.

ASSISTANT: You are welcome.