You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I best assist you now?

USER: I am Larry Gonzalez, please can you help me to book a ticket from Denver, DEN to Phoenix, PHX?

ASSISTANT: Sure, can you please provide me your journey dates?

USER: I will depart on 12/06 and return on 12/08.

ASSISTANT: Do you need any way station in between journey?

USER: I need a single halt in between journey.

ASSISTANT: Ok, please wait for a couple of minutes. Sorry to specify that, there is no flight found on your journey dates.

USER: Ok, thanks for informing me.

ASSISTANT: Thanks for reaching us, have a great day.