You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Carolyn Gonzalez here.

ASSISTANT: How may I guide you?

USER: I would like to book a ticket from PHX to DTW, can you please help me with that?

ASSISTANT: Carolyn Gonzalez, may I know your planned dates for this journey?

USER: The travel dates are from 03/24 to 03/26.

ASSISTANT: Ok, please be on hold for a while.

USER: Ok.

ASSISTANT: Sorry to inform you but there are no flights available on your requested route. Thank you for choosing us.

USER: That's ok, thank you for your help.

ASSISTANT: Have a nice day.