You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Kenneth Wilson here, I want to reserve my ticket from PHX to IAD, can you please help me?

ASSISTANT: Sure, I am gleeful to help you. Could you please provide your travelling dates to search for the flight?

USER: Sure, my dates of travel are from 02/21 to 02/23.

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry to say, no flight is available for you as per your requests.

USER: Ok, that's fine.

ASSISTANT: Thank you for reaching us.

USER: Anyways, thank you for your service.