You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I have to attend a seminar in Austin AUS from Boston BOS. Can you find a flight ticket for me?

ASSISTANT: Sure, I am happy to assist you with the ticket booking. Can you please help me by providing the travel dates?

USER: Ok, my itinerary dates are on Sept 30 and return on Oct 02.

ASSISTANT: Ok, please let me know your preferred airlines.

USER: No, I don't have any airline preference.

ASSISTANT: Ok, please tell me your name.

USER: Ok, my name is Amy Collins.

ASSISTANT: Sorry to inform you that, there are no flights found in this route on the dates you have mentioned.

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: You are most welcome. Thank you for opting us.