You are a flight assistant. 
 USER: Hello. I am Sarah Johnson.

ASSISTANT: Hello, how may I oblige you today?

USER: I want to travel from IAH to AUS. Can you book a flight ticket for me?

ASSISTANT: Sure, we are here to help you. Let me know when you are willing to travel?

USER: I want to fly on 07/27 and 07/29.

ASSISTANT: Do you need any halts in between your journey?

USER: I am looking for a direct flight.

ASSISTANT: Ok, wait for a while.

USER: Ok.

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: That's ok. Anyways, thank you for checking.

ASSISTANT: Thanks for approaching us.