You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I would like to attend a conference meeting at DFW. Can you book a flight ticket from EWR?

ASSISTANT: Sure, kindly share your travel dates.

USER: My travel dates are Jan, 20 and Jan, 22.

ASSISTANT: Do you have any connection limit?

USER: I need single connection.

ASSISTANT: Is there any other specifications?

USER: I like to travel in business class.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: It's ok, not an issue. Thank you.

ASSISTANT: Please share your name.

USER: Timothy Carter here.

ASSISTANT: Thank you.