You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you please reserve me a flight ticket from PHX to IAD?

ASSISTANT: Sure, I will help you. Please help me with your planned travelling dates.

USER: Sure, my travel dates are from July 21 to July 23.

ASSISTANT: Please help me with your name.

USER: Myself Charles Edwards.

ASSISTANT: Do you need a break in between your journey?

USER: Yes, I need a break in between my journey. Sorry, I need a direct flight.

ASSISTANT: Do you have any other preferences in your journey?

USER: No.

ASSISTANT: Please allow me a minute.

USER: Sure.

ASSISTANT: Charles Edwards, sorry to inform you that there are no flights available for your journey.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us. Have a great time.