You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I amend you?

USER: I have to attend prestigious project bidding on 01/31 in Dallas.

ASSISTANT: Ok.

USER: Can you please book a ticket for me under 1000 fare?

ASSISTANT: Sure, I am here to help you.

USER: Thanks.

ASSISTANT: May I know your return date?

USER: Sure, my return is on 02/02.

ASSISTANT: Please share me your nearest airport codes?

USER: Ok, Austin, TX - AUS is my nearest airport that I will start from here.

ASSISTANT: May I know your good name please?

USER: My destination airport is DFW and my name is Timothy Johnson.

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

USER: Ok, no problem. I will try with other way.

ASSISTANT: Thanks for your kind approach.

USER: Thanks for the information.