You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Gregory Walker here, I want to reserve my ticket from PHX to OAK, can you please help me out?

ASSISTANT: Sure, I will help you with that. Can I have your travel dates please?

USER: Sure, my planned dates of journey are from 02/09 to 02/11.

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry to say, there is no flight available for you.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Anyways, thank you for your service.