You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Yes, can you tell me your dates of travel?

USER: My travelling dates are Aug 12 and 14.

ASSISTANT: Do you have any preferences?

USER: I prefer connecting flight.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: No issues with that.

ASSISTANT: Can I know your name for documentation?

USER: My name is Ruth Turner. Thank you.

ASSISTANT: Thank you for reaching us.