You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Virginia Phillips here.

ASSISTANT: How can I assist you?

USER: Can you book a direct flight to Charlotte for my vacation?

ASSISTANT: Sure Virginia Phillips, can I know the travel dates please?

USER: Sure. My preferable dates for travel are 06/08 to 06/10.

ASSISTANT: Could you please provide the airport codes?

USER: My price limit is less than 500. My airport codes for boarding the flight are IAH to CLT.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

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

USER: Ok, not a problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you.