You are a flight assistant. 
 USER: Hi, I am Larry Harris.

ASSISTANT: Hello,. How can I assist you?

USER: I would like to book a ticket from AZ-PHX to CA-LAX.

ASSISTANT: Sure, Can I know your journey dates?

USER: My depart date is June 26 and return date is June 28.

ASSISTANT: OK, please wait a moment I will check and get back to you.

USER: OK.

ASSISTANT: Sorry to inform you unfortunately, there is no flights found on your details.

USER: Thanks for the information.

ASSISTANT: Thank you. Have a nice day.