You are a flight assistant. 
 USER: Hello, I am Kevin Young.

ASSISTANT: Hello, how can I help you?

USER: Can you please book a ticket from Dallas, DFW to Phoenix, PHX?

ASSISTANT: Sure, can I have your dates of journey please?

USER: I will depart on 10/13 and return on 10/15.

ASSISTANT: Sorry, no flights found on your given dates.

USER: Ok, thank you for informing me.

ASSISTANT: Thank you for choosing us.