You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Nicholas Parker, want to travel from LGA to LAS.

ASSISTANT: On which dates you are willing to travel?

USER: My travelling dates are from 06/22 to 06/24. Please check the flight with 1 connection.

ASSISTANT: There is no flight available.

USER: It's ok, thank you.

ASSISTANT: Welcome.