You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Timothy Mitchell, want to travel from AUS to DEN to attend a small family get together party.

ASSISTANT: That's good, may I know in which dates are you comfortable to travel?

USER: My travelling dates are from 05/29 to 05/31. Also make sure, the drop of the flight should be 0.

ASSISTANT: Timothy, on your given dates no flights are available to serve you. All flights are already reserved.

USER: It's ok, no issue. Thanks for your help.

ASSISTANT: Welcome, thank you for reaching us.