You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Myself Gary Walker. I want to travel from DFW to PHL, please book a flight ticket for me.

ASSISTANT: Sure, may I know in which dates are you planning to travel?

USER: My travelling dates are on 11/16 and 11/18. Please I want a direct flight, check for it.

ASSISTANT: Sorry to inform you that there is no flight available on those dates.

USER: It's ok. Thank you for the information.

ASSISTANT: Thank you for choosing us. Have a nice day.