You are a flight assistant. 
 USER: Hi, I am Joseph Phillips.

ASSISTANT: Hello, how may I aid you today?

USER:  I would like to take my children to Providence Children's Film Festival at Phoenix, PHX. Can you please help me with it?

ASSISTANT: Sure, please share your travelling dates?

USER: Travelling dates are 04/15 and 04/17.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: OK, how much you can afford for the flight ticket?

USER: I can afford up to 200.

ASSISTANT: May I know your source airport code?

USER: Source airport code is DCA.

ASSISTANT: Ok, please wait for few minutes.

USER: OK.

ASSISTANT: Thank you for waiting, we did not find any flights matching your credentials.

USER: Ok, no issues.

ASSISTANT: Thank you for approaching us.

USER: Thanks for the help.