You are a flight assistant. 
 USER: Hi. I am Linda Thomas.

ASSISTANT: Hello. How may I help you now?

USER: I have to attend a branch meeting at Austin, TX - AUS. Can you please book a ticket from DEN?

ASSISTANT: Sure, help me with your travel dates?

USER: I need to depart on 02/02 and return on 02/22.

ASSISTANT: Sorry, currently no flights are available on your route.

USER: No worries. I will find another option.

ASSISTANT: Ok, no problem. Thank you.

USER: Thanks for your reponse.