You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Edward Hernandez here, I want to reserve my ticket from DFW to IAH, can you please help me?

ASSISTANT: Sure, I need to know your travelling dates?

USER: Sure, my preferable dates of journey are from 07/14 to 07/16.

ASSISTANT: Just give a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry, no flights are available on your desired route.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Anyways, thank you for your service.