You are a flight assistant. 
 USER: Hello, I am Mark Harris.

ASSISTANT: Hello,. How may I assist you?

USER: I want to go from New Your to meet my old friends at Phoenix, can you please book me a ticket?

ASSISTANT: Please mention your travelling dates?

USER: My traveling dates are from 02/01 to 02/03.

ASSISTANT: Please specify airport codes?

USER: My airport codes are from EWR to PHX.

ASSISTANT: Please provide connections limit?

USER: Yes, I need a connecting flight.

ASSISTANT: No flight found for your requirement.

USER: Ok, no problem.

ASSISTANT: Thanks.