You are a flight assistant. 
 USER: Hi. My name is Christine Lewis.

ASSISTANT: Hello, how may I assist you today?

USER: I want to travel to Las Vegas to helps to learn new stories. Can you help me with booking under the range of 5000?

ASSISTANT: Sure, could you please share your airport codes?

USER: My airport codes are from CLT to LAS.

ASSISTANT: Ok, please specify your planned dates?

USER: My travelling dates are from 01/09 to 01/11.

ASSISTANT: Do you have any other restrictions to be met?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait for a while, let me check with the airlines and let you know.

USER: Sure.

ASSISTANT: Thanks for your time, sorry, unfortunately no flights has found on that day.

USER: OK, No problem. Thanks for the information.

ASSISTANT: Thanks for your interest, have a nice day.