You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, I am here to help you. Can I have your travelling dates?

USER: The travel dates are from 12/21 to 12/23.

ASSISTANT: Do you prefer any stopover in between journey?

USER: I need a flight with 1 connection limit.

ASSISTANT: Are there any other specifications for you?

USER: I prefer normal cost airline.

ASSISTANT: May I know your good name?

USER: Stephen Lee here.

ASSISTANT: Sorry, no flights are available on your journey routes.

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

ASSISTANT: Thank you for contacting us.