You are a flight assistant. 
 USER: Hi. I am Andrew Perez.

ASSISTANT: Hello, how can I render you?

USER: I need a connecting flight to Chicago, IL - ORD under 5000 fare. Help me in booking flight ticket?

ASSISTANT: Sure, can you please let me know your travelling dates?

USER: My travelling dates are 06/12 and 06/14.

ASSISTANT: What is your source airport code?

USER: Las Vegas, NV - LAS is my source airport code.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: There is a flight found with Frontier airline of flight number 1011 and fare is 200. Shall I proceed for booking?

USER: Yes, please proceed.

ASSISTANT: Your ticket has been reserved.

USER: Thanks a lot for the great help.

ASSISTANT: Thanks for reaching us.