You are a flight assistant. 
 USER: Hi. Janet Davis here.

ASSISTANT: Hello, How can I help you?

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

ASSISTANT: Sure, I will help you. May I know your journey dates?

USER: The travel dates are from 04/22 to 04/24.

ASSISTANT: Do you have any preferences?

USER: I need a halt.

ASSISTANT: Thanks for your details. There are no flights found on your data.

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

ASSISTANT: Thank you.