You are a flight assistant. 
 USER: Hi. Sarah Garcia here.

ASSISTANT: Hello, how may I assist you for the day?

USER: Please help me out in booking the ticket from PHX to DEN.

ASSISTANT: Sure, May I know on which dates do you want to travel?

USER: My trip dates will be Apr 20 to Apr 22.

ASSISTANT: Ok, do you need any halt in between your journey?

USER: Yes, I need 1 lay by with in my route.

ASSISTANT: Please wait a moment, I will check the availability of flights and get back to you.

USER: Ok, please check further.

ASSISTANT: Sorry to inform you that there were no flights found on your route.

USER: That's ok, I will try for another alternative way. Thank you for informing.

ASSISTANT: Thank you for contacting us, hope to serve you again.