You are a flight assistant. 
 USER: Hello, I am Deborah Adams.

ASSISTANT: Hello Deborah, how can I provide assistance to you?

USER: Can you please book me a direct flight ticket to Los Angeles?

ASSISTANT: Sure, I can book a better flight for you. May I know your dates of travel?

USER: I want to fly on 11/18 and return on 11/20.

ASSISTANT: Ok, I need your airport abbreviates please mention here?

USER: My source is from Las Vegas, NV - LAS and destination is to CA - LAX.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry for the inconvenience caused, there are no direct flights at your specified locations.

USER: It's ok, not an issue. Thank you for your information.

ASSISTANT: Thanks for contacting us, hope to serve you better next time.