You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kevin Thomas here.

ASSISTANT: How can I assist you today?

USER: I want to reserve my ticket from AUS to DEN, can you please help me in this?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Sure, my planned dates of journey are from 11/29 to 12/01.

ASSISTANT: Please give me a moment.

USER: Sure, I will wait.

ASSISTANT: Thanks for waiting, there is no flights found under your preferable details.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thanks for reaching us, have a great day.