You are a flight assistant. 
 USER: Hello. I am Karen Hall.

ASSISTANT: Hello. How may I guide you?

USER: I want to book a flight ticket from DFW to HOU. Can you make a reservation for me?

ASSISTANT: Sure, I am here to help you with that. Can you please tell me your travel dates?

USER: Thank you. my planned trip dates are on June 18 and back on June 20.

ASSISTANT: Ok, please give me a minute.

USER: Please check the flight availability in the morning.

ASSISTANT: Sorry to inform you, there are no flights departing in the morning time on the dates you have given.

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: My pleasure to inform you, thank you for reaching us.