You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Anna Gonzalez here. I want to travel from DTW to EWR. Can you help me?

ASSISTANT: Sure, I am here to help you out. Can you please provide your travel dates?

USER: My planned  travel dates are from Feb 18 to Feb 20.

ASSISTANT: Do you any specifications?

USER: Yes, I need a connecting flight and my depart time should be morning and my return time is afternoon.

ASSISTANT: Ok, may I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: Ok. Thank you for providing your travelling details. Please be on hold, let me check for the flight availability.

USER: Sure, I will wait for your information.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: Not a problem. Thank you for your kind information.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your service.