You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I am William Martin. I need to book a flight ticket from PHL to DFW, Can you please help me for booking?

ASSISTANT: Sure, can you share your journey dates?

USER: I would like to travel on 07/30 to 08/01.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.