You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Margaret Turner.

ASSISTANT: How may I guide you today?

USER: I planned to meet my friend in LAX, can you please help me to book a flight ticket from LAX?

ASSISTANT: Sure, I will help you with that. May I know your journey dates?

USER: I prefer to travel on 03/19 and 03/21.

ASSISTANT: Wait for a minute.

USER: Sure.

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

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.