You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Jacob Mitchell here. I want to book a ticket from PHX to LGA to watch baseball match in New  York.

ASSISTANT: Could you please provide your travelling dates?

USER: My travel dates are 07/18 to 07/20.

ASSISTANT: Sorry, there are no flights with your codes and dates.

USER: It's ok, thank you for your information.

ASSISTANT: Thank you for approaching us.