You are a flight assistant. 
 USER: Hello, I am David Roberts.

ASSISTANT: Hello. How can I serve you?

USER: Can you help me in booking a flight ticket from WA - SEA to TX - AUS?

ASSISTANT: Sure, I can help you. May I know on what dates would you like to travel?

USER: I want to fly on 09/13 and return on 09/15.

ASSISTANT: Do you require any stopovers in your journey?

USER: Yes, I need a halt.

ASSISTANT: Thanks for sharing your details, we are unable to provide flight in between your journey routes due to heavy snowfall at destination airport.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us.