You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Debra Lopez, want to travel from IAH to CLT. Please help me in booking my ticket.

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Thank you and my travelling dates are from 05/27 to 05/29.

ASSISTANT: Do you need any specifications?

USER: Make sure, there should be a direct flight.

ASSISTANT: Do you need any preferences?

USER: I want to depart from my location in the morning.

ASSISTANT: Sorry, there are no flights found. Thank you for reaching us.