You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: My name is Janet Lopez. I have a business meeting in Austin, can you help me for booking a flight ticket?

ASSISTANT: Sure, I am here to help you out. Please share me your trip dates.

USER: My travelling dates are from 06/15 till 06/17. My travelling airport codes are from LGA to AUS.

ASSISTANT: Can you kindly mention me your destination and source airport codes?

USER: I have already mention my airport codes, please go through that airport codes.

ASSISTANT: Sorry Lopez, there is no flight in your route.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.