You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Thomas Carter here.

ASSISTANT: How can I help you?

USER: Can you please help me in booking my flight from JFK to reach PHX?

ASSISTANT: Let me know your travelling dates.

USER: Sure, my trip dates are Feb 15th and 17th.

ASSISTANT: Do you have any preference?

USER: I need a single connecting flight. I must return in the afternoon.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thanks for the information.