You are a flight assistant. 
 USER: Hello, I am Charles Edwards.

ASSISTANT: Hello,. How may I help you?

USER: I am planning to visit Heard museum in Phoenix AZ - PHX, can you please help me to book a flight ticket from LAS?

ASSISTANT: Sure. Could you please let me know your travel dates.

USER: My journey dates are 11/28 to 11/30.

ASSISTANT: Ok. Connecting flight can be booked with airline Hawaiian for price 100. Shall I book a ticket?

USER: I need a direct flight, do not proceed.

ASSISTANT: Thank you.

USER: Thank you for your service.