You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Timothy Martin here.

ASSISTANT: How can I help you today?

USER: I want to attend a Seminar in Austin. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: My travelling dates are from 10/16 to 10/18.

ASSISTANT: Ok, may I know your airport codes?

USER: My airport codes are from LAS to AUS.

ASSISTANT: Please wait a moment.

USER: Ok, I will wait.

ASSISTANT: Sorry, no flights are available on your planning dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing us.