You are a flight assistant. 
 USER: Hello. I am Charles Baker.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to take my children to Austin Children's Museum at Austin, AUS. So, can you please book me a flight ticket from LAS?

ASSISTANT: May I know on which dates you are willing to travel?

USER: Yes, 01/29 and 01/31 are my preferable dates.

ASSISTANT: Ok, please  wait for a while.

USER: Ok.

ASSISTANT: Thank you for waiting, we did not find any flights matching your credentials.

USER: No issue, thank you.

ASSISTANT: Thank you for reaching us.