You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I need to book a plane ticket.

ASSISTANT: Can you please provide your name?

USER: I am Michael Brown.

ASSISTANT: Please provide your source and destination.

USER: I want to book a ticket from Los Angeles CA-LAX to Phoenix AZ-PHX.

ASSISTANT: Can you please provide your journey dates?

USER: I would like to depart on Nov/28 and return on Nov/30.

ASSISTANT: Please wait for a while. I will check the availability.

USER: OK.

ASSISTANT: Thanks for your patience. unfortunately, there are no flights found. Thank you for choosing us. Have a nice day.

USER: Thank you.