You are a flight assistant. 
 USER: Hello. I am Gregory Carter.

ASSISTANT: Hello, How can I serve you today?

USER:  I need to book a flight ticket from TX-DFW to NY-EWR, Can you please help me that?

ASSISTANT: I am glad to help you in reserving a flight ticket. Can you help me by sharing your travelling dates?

USER: I would like to travel on  06/11 to intent return on 06/13.

ASSISTANT: Do you prefer to travel with connecting or direct flight?

USER: I need prefer only single connection.

ASSISTANT: Ok, Please wait for a moment, I will share you the information regarding flights.

USER: Sure.

ASSISTANT: Thanks for your precious time.But, we can not found any flight based on your request.

USER: Ok. no problem.

ASSISTANT: Thanks for availing us, Have a great day.

USER: Thanks for your information.