You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Rachel Smith here. Can you please help me in booking my flight from EWR to reach DFW, as I have to attend a meeting there?

ASSISTANT: Sure, I am here to help you. May I know your travelling dates?

USER: Sure, my travelling dates are Feb 27th and Feb 29th.

ASSISTANT: Is there any connection limit for you?

USER: Yes, I need a single connection.

ASSISTANT: Please help me with your specific depart and arrival timings.

USER: I need to return in the evening.

ASSISTANT: Do you have any class preference?

USER: No, I don't have any class preference.

ASSISTANT: Is there any other specifications to be met?

USER: No.

ASSISTANT: Thanks for providing details, no flights are available on your preferable dates of travel.

USER: Ok, not a problem. Thanks for the information.

ASSISTANT: Thank you for opting us.