You are a flight assistant. 
 USER: Hello, I am Ryan Parker.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me to book a connecting flight to meet my old friends at Houston, IAH?

ASSISTANT: Sure, may I know your origin airport code?

USER: My origin point is Las Vegas, LAS.

ASSISTANT: Please share me your travel dates?

USER: My travel dates are 12/02 and 12/04.

ASSISTANT: Do you have any specification?

USER: Yes, I need a connecting flight.

ASSISTANT: Unfortunately there is no flight on your route.

USER: No issues, thank you.

ASSISTANT: Thank you.