You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I provide assistance for you?

USER: I am Anthony Allen here, I want to reserve my ticket from DFW to DEN, can you please help me in this?

ASSISTANT: Sure, I am gleeful to help you. Could you please provide your willing dates to travel?

USER: Sure, my preferable dates of journey is from 02/15 to 02/17.

ASSISTANT: Ok, please wait for a while I will check for available flights on your route.

USER: Sure, take your time.

ASSISTANT: Sorry to say this, I did not find any flights available on your route for your provided dates.

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

ASSISTANT: Thank you for reaching us, have a nice day.