You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know your good name?

USER: I am Frank Parker.

ASSISTANT: Thank you for provide your name. How may I best assist you today?

USER: Can you please book me a flight ticket to Las Vegas for horse ride with my friends?

ASSISTANT: Sure, may I know your departure and return dates?

USER: I need to depart on 01/15 and return on 01/17.

ASSISTANT: Can I have your airport codes?

USER: PHL is source and destination is LAS.

ASSISTANT: Please wait for a moment, I will revert to you.

USER: Sure.

ASSISTANT: Thank you for your precious time. There are no flights found with your specifications.

USER: Ok, no issues, thanks for your quick response.

ASSISTANT: Thank you for approaching us. Have a good day.