You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How I'm I suppose to help you today?

USER: I'm Melissa Thompson. Reserve a flight ticket from BOS to AUS.

ASSISTANT: Melissa Thompson, can you please mention your travelling dates for this journey?

USER: Sure, my travelling dates are 11/22 and 11/24.

ASSISTANT: Ok, can you please hold on for a moment till I check with availability for you?

USER: Ok, take your time.

ASSISTANT: Thank you for waiting patently.

USER: Ok.

ASSISTANT: I am so sorry to inform you, but there are no flights available on your requested dates. So, I will not be able to help you with booking.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for consulting with our agency and our services.