You are a flight assistant. 
 USER: Hello, this is Joseph Mitchell.

ASSISTANT: Hello, how may I help you today? Nice to meet you.

USER: I work in ABM Industries Inc. which is a facility management provider in the United States. And I am going to fly there from SFO on 09/19.

ASSISTANT: Ok.

USER: And my destination is at JFK on 09/21.

ASSISTANT: Thank you for your details, let me check the availability.

USER: Ok.

ASSISTANT: Sorry. There is no flight is available with your dates. Do you have any other dates to book a flight?

USER: Ok, not an issue. Thanks for your information.

ASSISTANT: Welcome.