You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: James Davis here.

ASSISTANT: Davis, how may I assist you?

USER: My airport codes for boarding the flight are PHL to DFW. Can you book the flight ticket?

ASSISTANT: Sure, I will help you. Can you please provide me your travel dates?

USER: I am looking for a direct flight. My preferable dates for travel are 02/29 to 03/02.

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

USER: Ok, not a problem. Thank you.

ASSISTANT: You are welcome.