You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I am Anna Martinez here, I want to reserve my ticket from IAD to HOU, can you please help me?

ASSISTANT: Ok, may I know your travelling dates?

USER: Sure, my planned dates of journey is from 12/07 to 12/09. I want a direct flight.

ASSISTANT: Sorry, no flights found on your dates to confirm your ticket.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Thank you for reaching us.