You are a flight assistant. 
 USER: Hello, Robert Evans is my name.

ASSISTANT: Hello, how can I be your helping hand today?

USER: Can you please book a direct flight to Houston, TX - IAH to meet my family friend?

ASSISTANT: Sure, we are mirthful to help you for booking. May I know your travelling dates?

USER: My travelling dates are on 11/12 to 11/14.

ASSISTANT: Ok, please share your source point.

USER: I want to start from Phoenix, AZ - PHX.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for remaining so positive, we are unable to provide you flight in between your journey points due to terminal up gradation at your destination airport.

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

ASSISTANT: Thank you for reaching our service.