You are a flight assistant. 
 USER: Hello,. I am Charles Scott.

ASSISTANT: Hello, how can I help you?

USER: I would like to attend Northwest Folklife Festival in Washington, IAD. Can you please book a flight ticket from Phoenix, PHX?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Do you need any halt in between your journey?

USER: I need a halt in between journey.

ASSISTANT: Ok, please help me with your travelling dates.

USER: My journey start on 04/16 and need to catch return flight on 04/18.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for your patience, There were no flights found with your given details.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.