You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: As I am a scientist, I want to attend science festival with my students at Los Angeles. Can you help me to book a ticket from LAS to LAX?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: My trip dates are 05/22 and 05/24.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: May I know your name please?

USER: Rachel Rodriguez here.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for contacting us.