You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you please help me in booking a flight from DFW to HOU?

ASSISTANT: Sure, We are here to assist you.

USER: Thank you.

ASSISTANT: When would you like to make your trip?

USER: My planned dates are on Sept 30th to Oct 2nd.

ASSISTANT: May I know your name?

USER: Sure, my name is Dennis Martinez.

ASSISTANT: Is there any other specifications?

USER: I need a flag stop in between the journey.

ASSISTANT:  We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: No worries, thank you.

ASSISTANT: Thank you for reaching us.