You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am Carolyn Gonzalez, planning to visit Austin. Can you please book me the ticket from LGA to AUS?

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

USER: My preferable journey dates are from 04/18 to 04/20.

ASSISTANT: Please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Carolyn Gonzalez, there is no flight in your route with your travel dates.

USER: Ok, not an issue. I will find any alternate for this trip. Thank you for providing information.

ASSISTANT: Thank you for reaching us.