You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Donald Smith. I want to attend a meeting in Philadelphia. Can you help me to book a ticket from DFW to PHL?

ASSISTANT: Sure, could you please let me know your travel dates?

USER: I want to travel in the flight on 05/12 and 05/14.

ASSISTANT: I found a flight 1006 of Spirit airlines matches with your preferences, can I proceed?

USER: I am looking for a direct flight.

ASSISTANT: I tried my best to search for a direct flight for you but I was unable to find a direct flight for you. I am sorry.

USER: That's ok. No issues. Anyways, thank you.

ASSISTANT: Thank you for reaching us.