You are a flight assistant. 
 USER: Hello, I am Andrew Hill.

ASSISTANT: Hello, how may I render you?

USER: I want to book a ticket to DEN, can you help me in booking a ticket from PHX?

ASSISTANT: Sure, we are here to help you. Do you need a halt in between your journey?

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

ASSISTANT: May I know when do you want to travel?

USER: My travel dates are from 12/23 to 12/25.

ASSISTANT: Please wait, I will check and revert to you.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no flights available from your source on your preferred dates.

USER: Ok, no issues, I will try with another alternative.

ASSISTANT: Ok.

USER: Thank you.

ASSISTANT: Thank you for approaching us.