You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Elizabeth Walker.

ASSISTANT: Nice to meet you Elizabeth Walker.

USER: I need to fly in a direct fight to reach my destination as soon as possible because my grandmother is admitted in hospital. Can you help me with booking from Las Vegas to Seattle?

ASSISTANT: Sure, I will help you with that before that I need your travel dates to search best flight for you.

USER: My travelling dates are 08/17 and return on 08/19.

ASSISTANT: Please provide me your travelling airport codes.

USER: LAS is my origin and SEA is my destination.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry for this inconvenience, I could not find any direct flight for this routes.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: It's my pleasure, have a nice day.