You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you.

USER: I am Margaret Clark.

ASSISTANT: Ok.

USER: Could you help me with reserving a flight ticket to Denver, DEN from Houston, IAH?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Kindly, mention your depart date.

USER: I will be start my journey on 07/07. I need a halt in my journey.

ASSISTANT: May I know your arrival date of journey?

USER: Again I will be return on 07/09.

ASSISTANT: Thank you for sharing your journey details. Please, hold on.

USER: Sure.

ASSISTANT: Thank you for your precious time. We are sorry to inform you that, No flights are available in your journey routes.

USER: Ok, I will choose another airline.

ASSISTANT: Fine.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a good day.