You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Donna Martinez here.

ASSISTANT: Ok.

USER: I want to reserve my ticket from PHX for a roundup trip, can you please help me?

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

USER: Ok, my dates of travel are from 06/30 to 07/02.

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: Welcome, have a great day.