You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you at this moment?

USER: I am Patrick Garcia here, I want to reserve my ticket from LGA to AUS, can you please help me out?

ASSISTANT: Sure. Can you please mention your preferable travel dates?

USER: Sure, my willing to travel dates are from Oct, 01 to Oct, 03.

ASSISTANT: At what time are you planning to depart and return?

USER: Yes, I need a depart time at afternoon and return time at evening.

ASSISTANT: Is there any additional preferences do you have?

USER: Yes, I need a connecting flight.

ASSISTANT: Ok, please wait a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

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

ASSISTANT: Thank you for reaching us.