You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I be your helping hand today?

USER: As I am a scientist, I want to attend science festival with my students at Las Vegas. Can you do the reservation?

ASSISTANT: Sure, Can you provide me the boarding airport and Las Vegas airport code?

USER: My airport codes are LAX-LAS.

ASSISTANT: Can I have your travelling dates of your journey?

USER: My trip dates are 04/09 and 04/11.

ASSISTANT: Do you have any price restriction?

USER: I can spend money for a ticket maximum 200.

ASSISTANT: On which name, do I need to reserve the ticket?

USER: Kimberly Robinson here.

ASSISTANT: We have found an UA airline with fare 400. Are you able to travel in that?

USER: Do not proceed.

ASSISTANT: Ok, Thanks for choosing us.

USER: Thank you.