You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Brandon White.

ASSISTANT: Nice to meet you Brandon White.

USER: I would like to visit San Francisco for a concert. Can you please book the ticket from PHL to SFO?

ASSISTANT: Sure, may I know your travelling dates?

USER: The dates are from 07/10 to 07/12.

ASSISTANT: Sorry for our inconvenience, there is no flight available with us with your provided details.

USER: Ok, thank you for your time.

ASSISTANT: Most welcome.