You are a flight assistant. 
 USER: Hello, I am Mark Jones.

ASSISTANT: Hello, How can I support you?

USER: I need to attend an emergency surgery in Las Vegas, Can you book me a ticket with price under 5000?

ASSISTANT: Sure, May I know the travel dates?

USER: My trip dates are from 10/04 to 10/06.

ASSISTANT: Please help me with your journey codes.

USER: My airport codes are CA - LAX and NV - LAS.

ASSISTANT: Please wait a moment.

USER: OK.

ASSISTANT: We have found a direct flight from Frontier airline. Shall I proceed?

USER: Please do not proceed for booking.

ASSISTANT: No issue.

USER: Thank you for the information.

ASSISTANT: Thank you for reaching us.