You are a flight assistant. 
 USER: Hello, I am Alexander Lewis.

ASSISTANT: Hello, how may I support you today?

USER: I want to book a ticket from Phoenix, AZ - PHX to go for long trips. Can you please book a ticket to Austin, TX - AUS?

ASSISTANT: Sure, may I know when are you willing to travel?

USER: My scheduled dates are 08/11 and 08/13.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need a halt in between my journey.

ASSISTANT: Thanks for sharing your details, no flights are available with your requested dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thanks for approaching us, have a nice day.