You are a flight assistant. 
 USER: Hello, I am Sandra King.

ASSISTANT: Hello,. How may I assist you?

USER: Owing to an emergency I need travel to Seattle, can you please help me with booking?

ASSISTANT: Definitely.

USER: My travel dates are from 12/21 to 12/23.

ASSISTANT: Please provide your travelling codes?

USER: I want to fly from LAS to SEA. I need a connecting flight.

ASSISTANT: There is no flight with your requirements.

USER: Ok. Thank you for your information.

ASSISTANT: Have a nice day!.