You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Anna Phillips.

ASSISTANT: Anna Phillips, how may I help you?

USER: Can you please help me in booking a flight ticket from PHX to LAS?

ASSISTANT: Sure, please provide your itinerary dates.

USER: I want to fly on Sept 28 and return on Sept 30.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a halt.

ASSISTANT: Sorry, no flights are available on your route.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for contacting us.