You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: I am Christine Moore. I want to book a flight ticket from TX - IAH to IL - ORD, can you help me in flight booking?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: I want to fly on Mar 27, return on Mar 29.

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: No problem, thank you.

ASSISTANT: Thank you for opting us.