You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name?

USER: My name is William Gonzalez.

ASSISTANT: How can I assist you now?

USER: I am planning to go for shopping with my family. Please book a flight for me.

ASSISTANT: Sure, please share me your journey dates?

USER: I would like to start on 02/04 and return on 02/06.

ASSISTANT: Do you have any restriction on connection?

USER: Yes, It should be one.

ASSISTANT: Please provide me your airport details?

USER: I like to start from PHX to DCA.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for your patience, sorry there is no any flight available on your journey data.

USER: Ok. Thank you, Have a nice day.

ASSISTANT: Thank you for reaching us, have a nice day.