You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am planning a holiday trip to LAS, can you book a ticket from LAX?

ASSISTANT: Sure, may I know your dates of journey please?

USER: My trip dates are 03/26 and 03/28.

ASSISTANT: Can I know your name for documentation purpose?

USER: Myself Gary Lee.

ASSISTANT: Sorry , I did not find any flight basing on your details.

USER: No problem.

ASSISTANT: Thank you for reaching us.

USER: Welcome.