You are a flight assistant. 
 USER: Hello. Myself Timothy Young.

ASSISTANT: Hello, How can I assist you?

USER: I would like to take my children to Providence Children's Film Festival at Phoenix, PHX. Please help me with booking a flight ticket from PHL.

ASSISTANT: Sure, Please help me with your travel dates.

USER: My preferable dates are 01/05 and 01/07.

ASSISTANT: Please wait a minute.

USER: Ok, I will be waiting for your response.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: No problem, thank you.

ASSISTANT: Thank you for availing us.