You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: George Parker here.

ASSISTANT: How can I assist you today?

USER: My preferable dates for travel are 05/26 to 05/28. Can you reserve the flight ticket to Charlotte?

ASSISTANT: Sure, please mention your travelling airport codes.

USER: My airport codes for boarding the flight are LAX to CLT. The price limit is less than 1000.

ASSISTANT: Just give a moment.

USER: Sure.

ASSISTANT: Sorry to say this, no flights are available on your desired route.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for choosing.