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

ASSISTANT: Hello, How can I help you?

USER: I need to book a flight ticket from TX-IAH to CA-LAX. Could you please help me with booking a flight ticket on 03/09?

ASSISTANT: Sure, May I know the return date?

USER: I intend to return on 03/09.

ASSISTANT: Please wait a minute.

USER: I regret I intend to return on 03/11.

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

USER: No problem, thank you for the information.