You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Can you help me to book a flight ticket from DFW?

ASSISTANT: Sure, can I know the travel dates please?

USER: My travelling dates are Apr 27 and 29.

ASSISTANT: Could you please provide the return details?

USER: I would like to return from BOS at afternoon flight.

ASSISTANT: May I know your name please?

USER: Sure, I am Kathleen Perez.

ASSISTANT: Do you have any requirements?

USER: Please search for a connecting flight.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: No issues, thank you for your response.

ASSISTANT: Thank you for approaching us.