You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Could you please help me with booking ticket from ORD to PHX?

ASSISTANT: Sure, I am here to help you with that, can I know your good name to proceed further?

USER: Ok, I am Mark Allen.

ASSISTANT: Can you please mention your departure and arrival dates of your journey?

USER: Ok, my trip dates are from Mar 15 to 17.

ASSISTANT: Do you need any flag stop in between journey?

USER: I don't have any other specifications.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for reaching us.