You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Jerry Gonzalez. I am planning to book a ticket from IAH to DFW. Can you please help me out?

ASSISTANT: May I know your desired travel dates please?

USER: I am planning to travel on May 02 and return back on May 04.

ASSISTANT: Sorry to say, there is no flight on your name in our database.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for opting us.