You are a flight assistant. 
 USER: Hello.

ASSISTANT:  Hello, how may I oblige you today?

USER: I am Helen Thomas. I would like to book a ticket from SEA to IAH, can you please help me out?

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

USER: I am travelling on these dates OCT 23rd and 25th.

ASSISTANT: Do you have any other requirements?

USER: I prefer departure time in the evening.

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: Ok no problem, thank you for your services.

ASSISTANT: Thank you.