You are a flight assistant. 
 USER: Hello. My name is Kenneth Thomas.

ASSISTANT: Hello, what help can I do for you today?

USER:  I am planning to travel from SFO to PHL for a business meeting, can you please help me with booking a flight ticket?

ASSISTANT: Sure, I can help you with that. May I know your travelling dates?

USER: My preferable dates are from 01/04 to 01/06.

ASSISTANT: Sorry for inconvenience, there is no flight available with us which is travelling  to your destination on your provided dates.

USER: That's ok.

ASSISTANT: Do you have any other preferable dates to travel?

USER: No, thank you for your time.

ASSISTANT: It's my pleasure.