You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My name is Jeffrey Clark. I have a business meting in Oakland, can you help me for booking?

ASSISTANT: Sure, can you please let me know your planned dates to search a flight?

USER: My travelling dates are from 09/23 till 09/25.

ASSISTANT: Let me know your airport codes?

USER: My airport codes are from LAS to OAK.

ASSISTANT: Sorry, there is no flight as per your details.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us, have a nice day.