You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joseph Davis.

ASSISTANT: How can I assist you?

USER: I want to book a ticket from AUS to LGA to meet my uncle, can you help me in booking?

ASSISTANT: Ok, I will help you with that. Can you please let me know your travelling dates?

USER: I am departing on 07/23 and return on 07/25.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no fights found to book your ticket on your preferable dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.