You are a flight assistant. 
 USER: Hi, my name is Jeffrey Clark from Phoenix.

ASSISTANT: Hello. How could I serve you the best today?

USER: I want to meet my Doctor for health checkup at TX - DFW, so that I need to book a flight with a halt.

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: Could you please assist me with your travelling dates?

USER: Sure, my travelling dates are on 03/08 to 03/10.

ASSISTANT: Kindly mention your source code please?

USER: My nearest airport is AZ - PHX, so I will start from there.

ASSISTANT: Unfortunately there are no flights found with your matching specifications in our data.

USER: That's Ok, thanks for your information.

ASSISTANT: Thank you for approaching us.