You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Kathleen Roberts.

ASSISTANT: How may I help you today?

USER: I have a meeting to attend at Philadelphia. Can you help me in booking a ticket from LAS to PHL?

ASSISTANT: Sure, may I know your travelling dates?

USER: My planned journey dates are 05/03 and 05/05.

ASSISTANT: Ok, wait for a minute.

USER: Sure, take your time.

ASSISTANT: Sorry for the inconvenience, no flight's available based on your travelling dates.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.