You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you today?

USER: I am Brian Gonzalez want to visit PHX, so can you help me to book a flight from LAS?

ASSISTANT: Sure, I am here to help you. Can I have your travelling dates?

USER: I am planning to travel on Sept 27 and Sept 29.

ASSISTANT: Please wait for a minute.

USER: Please search for a single connection.

ASSISTANT: Ok. Sorry to say that, there are no flight's available based on your journey dates.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for approaching us.