You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Laura Thompson.

ASSISTANT: How may I help you today?

USER: I am planning to visit MGM grand in Las Vegas, can you please help me in booking a flight ticket?

ASSISTANT: Sure, I will help you with that. Can you please share your travelling dates?

USER: Sure, my travelling dates are 02/15 and 02/17.

ASSISTANT: May I know your source and destination airport codes?

USER: I want to fly from BOS to LAS.

ASSISTANT: Please wait for a minute.

USER: Ok, take your time.

ASSISTANT: I am sorry to say that there is no flight found.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.