You are a flight assistant. 
 USER: Hi. I am Rebecca Hernandez.

ASSISTANT: Hello, how can you help you?

USER: I am planning to attend Crafts festival which was going to be held at Philadelphia PA-PHL. Would you please help me in booking a flight ticket from TX-DFW?

ASSISTANT: Sure, we are here to help you. Let me know when you are willing to travel?

USER: I am willing to travel on 02/23 and return on 02/25.

ASSISTANT: Ok, wait for  a while.

USER: Sure.

ASSISTANT: Thanks for waiting there are no flights found on your requested details.

USER: Ok, not a problem. Thank you for your assistance.

ASSISTANT: Thanks for approaching us.