You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Emma Green here.

ASSISTANT: How can I guide you at this moment?

USER: I want to reserve my ticket from ATL to IAH, can you please help me?

ASSISTANT: Sure, I will help you in flight ticket booking. Can you please provide your journey dates to proceed further?

USER: Sure, my preferable dates of journey are from 06/23 to 06/25.

ASSISTANT: Wait a moment please.

USER: Ok, I will wait.

ASSISTANT: Emma Green, no flight services available on this route on your provided dates.

USER: Ok, that's fine. Thank you for your service.

ASSISTANT: Thank you for contacting us.