You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to visit White House with my kids, could you help me in booing the ticket?

ASSISTANT: Sure, I will be glad to help you. Please provide your travel details.

USER: It's from PHX to DCA. The dates of travel are from 07/19 to 07/21.

ASSISTANT: Let me check.

USER: Ok.

ASSISTANT: May I know your name?

USER: My name is Anthony Jackson.

ASSISTANT: Sorry Anthony, we could not find any flight's matching with your dates.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you for contacting us.