You are a flight assistant. 
 USER: Hello, I'm Charles Gonzalez.

ASSISTANT: Hello, how may I serve you?

USER: I wish to fly from NC - CLT to TX - HOU to attend my wife's felicitation ceremony which will be held at her office.

ASSISTANT: Sure, may I know your journey dates?

USER: Can you help me, Please? My travel dates are from 04/07 to 04/09.

ASSISTANT: Ok, please wait a moment.

USER: Price limit of 1000 and direct flight are my other restrictions.

ASSISTANT: Thanks for waiting. Unfortunately there are no flights found with your requirement.

USER: OK.

ASSISTANT: Thanks for choosing us.

USER: Thank you, For providing me with valuable information.