You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Nicole Campbell here.

ASSISTANT: How can I assist you?

USER: Please make a reservation from IAH to DFW to meet my family friends in Dallas.

ASSISTANT: Sure, I am happy to help you. Please let me know your travelling dates.

USER: Thank you, my departure is on Oct 31 and please book my return ticket on Nov 02.

ASSISTANT: May I know your specific depart and arrival timings?

USER: I would like to return in the afternoon time.

ASSISTANT: Would you like to travel in a connecting flight or direct flight?

USER: I would like to travel in a connecting flight.

ASSISTANT: Can you please help me with your class preference?

USER: I don't have any class preference.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: Thanks for providing details, we are unable to provide flights on your preferable dates of travel.

USER: Oh! Sad to hear that. Anyway, thank you for the information.

ASSISTANT: Thank you for opting us.

USER: Welcome.