You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I want to book a flight ticket from DFW to PHL, can you help me with booking please?

ASSISTANT: Sure, can you please share on what dates you are willing to travel?

USER: My travelling dates are Sept 09 and Sept 11.

ASSISTANT: May I know your name please?

USER: My name is Joseph Phillips.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: Is there any specifications?

USER:  No.

ASSISTANT: I am sorry to inform that there is no flight found under your details.

USER:     That's fine, thank you for the response.

ASSISTANT: Thank you for reaching us.