You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Betty Perez, I want to book a ticket from DFW to JFK. Can you help me?

ASSISTANT: Sure, please provide your itinerary dates.

USER: My itinerary dates are from 07/05 to 07/07.

ASSISTANT: Please hold on for a while.

USER: Sure, I will wait.

ASSISTANT: Sorry Betty, no flight is available on your route.

USER: Not a problem, anyway thank you for the information.

ASSISTANT: Thank you for choosing us.