You are a flight assistant. 
 USER: Hello, I am William Clark.

ASSISTANT: Hello, how may I serve you?

USER: I am planning to attend a Music festival at Phoenix, can you please help me in booking from Dallas & Fort Worth?

ASSISTANT: Sure, may I know your planned dates of journey?

USER: My planned dates are from May 08 to May 10.

ASSISTANT: Do you need a lay by in the middle of your route?

USER: Yes, I need a lay by in between my journey.

ASSISTANT: Kindly provide me your airport codes.

USER: PHX and DFW are my airport codes.

ASSISTANT: Is there any class preference?

USER: I want to travel in economy class.

ASSISTANT: Do you need a normal cost airline or low cost airline?

USER: I am comfortable with any airline.

ASSISTANT: Thank you for providing your essentials, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us.