You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: Can you please help me in booking my flight ticket from PHX to SFO?

ASSISTANT: Sure, Please help me with your travel dates.

USER: My travel dates are 118/02 and 11/04.

ASSISTANT: Can I get your name?

USER: My name is Dennis Smith.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your selected dates.

USER: Ok, fine not an issue.

ASSISTANT: Thank you for availing us.

USER: Most welcome.