You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Please book a flight ticket from PHX to IAD.

ASSISTANT: Please provide your journey dates.

USER: I would like to take off on 22 Apr and return on 24 Apr.

ASSISTANT: Do you need any connection limit?

USER: I need a break in between journey.

ASSISTANT: Do you need any other specifications?

USER: I prefer to travel in normal cost airline.

ASSISTANT: May I know your name?

USER: I am Michael Perez.

ASSISTANT: There are no flights available on your required travelling dates.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for choosing us.