You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I'm Angela Allen here, I want to travel from LAS to LGA to meet my friend.

ASSISTANT: Good, can I know your travel dates?

USER: My preferable dates are from 06/21 to 06/23.

ASSISTANT: Give me a minute, let me check the details.

USER: Sure.

ASSISTANT: The flight 1007 of UA airlines with 0 connection is available on your requested dates.

USER: Ok, please book it.

ASSISTANT: Your ticket is booked.

USER: Thank you for your help.

ASSISTANT: Welcome.