You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your name please?

USER: My name is Gary King.

ASSISTANT: Ok Gary, how can I help you?

USER: I would like to book a flight from LGA to PHX.

ASSISTANT: May I know the travelling dates?

USER: My dates will be 04/02 to 04/04.

ASSISTANT: Sorry to inform you that there are no flights on your requested dates.

USER: On problem. No problem.

ASSISTANT: Have a good day.

USER: Thanks for your service.

ASSISTANT: Thank you for reaching us.